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With pyparsing, you don't need to learn a new syntax for defining grammars or matching expressions - the parsing module provides a library of classes that you use to construct the grammar directly in Python. Here is a program to parse "Hello, World!" (or any greeting of the form C{", !"}), built up using L{Word}, L{Literal}, and L{And} elements (L{'+'} operator gives L{And} expressions, strings are auto-converted to L{Literal} expressions):: from pyparsing import Word, alphas # define grammar of a greeting greet = Word(alphas) + "," + Word(alphas) + "!" hello = "Hello, World!" print (hello, "->", greet.parseString(hello)) The program outputs the following:: Hello, World! -> ['Hello', ',', 'World', '!'] The Python representation of the grammar is quite readable, owing to the self-explanatory class names, and the use of '+', '|' and '^' operators. The L{ParseResults} object returned from L{ParserElement.parseString} can be accessed as a nested list, a dictionary, or an object with named attributes. The pyparsing module handles some of the problems that are typically vexing when writing text parsers: - extra or missing whitespace (the above program will also handle "Hello,World!", "Hello , World !", etc.) - quoted strings - embedded comments Getting Started - ----------------- Visit the classes L{ParserElement} and L{ParseResults} to see the base classes that most other pyparsing classes inherit from. Use the docstrings for examples of how to: - construct literal match expressions from L{Literal} and L{CaselessLiteral} classes - construct character word-group expressions using the L{Word} class - see how to create repetitive expressions using L{ZeroOrMore} and L{OneOrMore} classes - use L{'+'}, L{'|'}, L{'^'}, and L{'&'} operators to combine simple expressions into more complex ones - associate names with your parsed results using L{ParserElement.setResultsName} - find some helpful expression short-cuts like L{delimitedList} and L{oneOf} - find more useful common expressions in the L{pyparsing_common} namespace class z2.2.1z18 Sep 2018 00:49 UTCz*Paul McGuire éN)Úref)Údatetime)ÚRLock)ÚIterable)ÚMutableMapping)ÚOrderedDict)iÚAndÚCaselessKeywordÚCaselessLiteralÚ CharsNotInÚCombineÚDictÚEachÚEmptyÚ FollowedByÚForwardÚ GoToColumnÚGroupÚKeywordÚLineEndÚ LineStartÚLiteralÚ MatchFirstÚNoMatchÚNotAnyÚ OneOrMoreÚOnlyOnceÚOptionalÚOrÚParseBaseExceptionÚParseElementEnhanceÚParseExceptionÚParseExpressionÚParseFatalExceptionÚParseResultsÚParseSyntaxExceptionÚ ParserElementÚQuotedStringÚRecursiveGrammarExceptionÚRegexÚSkipToÚ StringEndÚStringStartÚSuppressÚTokenÚTokenConverterÚWhiteÚWordÚWordEndÚ WordStartÚ ZeroOrMoreÚ alphanumsÚalphasÚ alphas8bitÚanyCloseTagÚ anyOpenTagÚ cStyleCommentÚcolÚcommaSeparatedListÚcommonHTMLEntityÚcountedArrayÚcppStyleCommentÚdblQuotedStringÚdblSlashCommentÚ delimitedListÚdictOfÚdowncaseTokensÚemptyÚhexnumsÚhtmlCommentÚjavaStyleCommentÚlineÚlineEndÚ lineStartÚlinenoÚmakeHTMLTagsÚmakeXMLTagsÚmatchOnlyAtColÚmatchPreviousExprÚmatchPreviousLiteralÚ nestedExprÚnullDebugActionÚnumsÚoneOfÚopAssocÚoperatorPrecedenceÚ printablesÚpunc8bitÚpythonStyleCommentÚquotedStringÚremoveQuotesÚreplaceHTMLEntityÚreplaceWithÚ restOfLineÚsglQuotedStringÚsrangeÚ stringEndÚstringStartÚtraceParseActionÚ unicodeStringÚupcaseTokensÚ withAttributeÚ indentedBlockÚoriginalTextForÚungroupÚ infixNotationÚlocatedExprÚ withClassÚ CloseMatchÚtokenMapÚpyparsing_commonécCs`t|tƒr|Szt|ƒWSty/t|ƒ t ¡d¡}tdƒ}| dd„¡| |¡YSw)aDrop-in replacement for str(obj) that tries to be Unicode friendly. It first tries str(obj). If that fails with a UnicodeEncodeError, then it tries unicode(obj). It then < returns the unicode object | encodes it with the default encoding | ... >. Úxmlcharrefreplacez&#\d+;cSs$dtt|ddd…ƒƒdd…S)Nz\urééÿÿÿÿ)ÚhexÚint©Út©ryú•/builddir/build/BUILDROOT/alt-python310-setuptools-58.3.0-4.el8.x86_64/opt/alt/python310/lib/python3.10/site-packages/setuptools/_vendor/pyparsing.pyÚ«ó$z_ustr..) Ú isinstanceÚunicodeÚstrÚUnicodeEncodeErrorÚencodeÚsysÚgetdefaultencodingr)ÚsetParseActionÚtransformString)ÚobjÚretZ xmlcharrefryryrzÚ_ustršs ûrˆz6sum len sorted reversed list tuple set any all min maxccs|]}|VqdS©Nry)Ú.0ÚyryryrzÚ ·s€rŒécCs:d}dd„d ¡Dƒ}t||ƒD] \}}| ||¡}q|S)z/Escape &, <, >, ", ', etc. in a string of data.z&><"'css|] }d|dVqdS)ú&ú;Nry)rŠÚsryryrzrŒ¾ó€z_xml_escape..zamp gt lt quot apos)ÚsplitÚzipÚreplace)ÚdataÚfrom_symbolsÚ to_symbolsÚfrom_Úto_ryryrzÚ_xml_escape¹s ršc@seZdZdS)Ú _ConstantsN)Ú__name__Ú __module__Ú__qualname__ryryryrzr›Ãsr›Ú 0123456789ZABCDEFabcdefé\Úccs|] }|tjvr|VqdSr‰)ÚstringÚ whitespace©rŠÚcryryrzrŒËó€c@sPeZdZdZddd„Zedd„ƒZdd „Zd d„Zdd „Z ddd„Z dd„ZdS)rz7base exception class for all parsing runtime exceptionsrNcCs>||_|dur||_d|_n||_||_||_|||f|_dS©Nr¡)ÚlocÚmsgÚpstrÚ parserElementÚargs)Úselfrªr¨r©ÚelemryryrzÚ__init__ÑszParseBaseException.__init__cCs||j|j|j|jƒS)z internal factory method to simplify creating one type of ParseException from another - avoids having __init__ signature conflicts among subclasses )rªr¨r©r«)ÚclsÚperyryrzÚ_from_exceptionÜsz"ParseBaseException._from_exceptioncCsJ|dkrt|j|jƒS|dvrt|j|jƒS|dkr!t|j|jƒSt|ƒ‚)z÷supported attributes by name are: - lineno - returns the line number of the exception text - col - returns the column number of the exception text - line - returns the line containing the exception text rL)r;ÚcolumnrI)rLr¨rªr;rIÚAttributeError)rÚanameryryrzÚ__getattr__äszParseBaseException.__getattr__cCsd|j|j|j|jfS)Nz"%s (at char %d), (line:%d, col:%d))r©r¨rLr³©rryryrzÚ__str__ósÿzParseBaseException.__str__cCót|ƒSr‰©rˆr·ryryrzÚ__repr__öózParseBaseException.__repr__ú>!} ('-' operator) indicates that parsing is to stop immediately because an unbacktrackable syntax error has been foundNrËryryryrzr%sr%c@ó eZdZdZdd„Zdd„ZdS)r(zZexception thrown by L{ParserElement.validate} if the grammar could be improperly recursivecCs ||_dSr‰©ÚparseElementTrace©rÚparseElementListryryrzr¯4ó z"RecursiveGrammarException.__init__cCs d|jS)NzRecursiveGrammarException: %srÍr·ryryrzr¸7rÑz!RecursiveGrammarException.__str__N)rœrržrÈr¯r¸ryryryrzr(2sr(c@s,eZdZdd„Zdd„Zdd„Zdd„Zd S) Ú_ParseResultsWithOffsetcCs||f|_dSr‰©Útup)rÚp1Úp2ryryrzr¯;óz _ParseResultsWithOffset.__init__cCó |j|Sr‰rÓ©rÚiryryrzÚ__getitem__=rÑz#_ParseResultsWithOffset.__getitem__cCst|jdƒS©Nr)ÚreprrÔr·ryryrzr»?r×z _ParseResultsWithOffset.__repr__cCs|jd|f|_dSrÜrÓrÙryryrzÚ setOffsetArÇz!_ParseResultsWithOffset.setOffsetN)rœrržr¯rÛr»rÞryryryrzrÒ:s rÒc@s¦eZdZdZd[dd„Zddddefdd„Zdd „Zefd d„Zdd „Z dd„Z dd„Zdd„ZeZ dd„Zdd„Zdd„Zdd„Zdd„ZerPeZ eZ eZneZ eZ eZ dd„Zd d!„Zd"d#„Zd$d%„Zd&d'„Zd\d(d)„Zd*d+„Zd,d-„Zd.d/„Zd0d1„Z d2d3„Z!d4d5„Z"d6d7„Z#d8d9„Z$d:d;„Z%d} - see L{ParserElement.setResultsName}) Example:: integer = Word(nums) date_str = (integer.setResultsName("year") + '/' + integer.setResultsName("month") + '/' + integer.setResultsName("day")) # equivalent form: # date_str = integer("year") + '/' + integer("month") + '/' + integer("day") # parseString returns a ParseResults object result = date_str.parseString("1999/12/31") def test(s, fn=repr): print("%s -> %s" % (s, fn(eval(s)))) test("list(result)") test("result[0]") test("result['month']") test("result.day") test("'month' in result") test("'minutes' in result") test("result.dump()", str) prints:: list(result) -> ['1999', '/', '12', '/', '31'] result[0] -> '1999' result['month'] -> '12' result.day -> '31' 'month' in result -> True 'minutes' in result -> False result.dump() -> ['1999', '/', '12', '/', '31'] - day: 31 - month: 12 - year: 1999 NTcCs"t||ƒr|St |¡}d|_|S©NT)r}ÚobjectÚ__new__Ú_ParseResults__doinit)r°ÚtoklistÚnameÚasListÚmodalÚretobjryryrzráks zParseResults.__new__c Csb|jr;d|_d|_d|_i|_||_||_|durg}||tƒr(|dd…|_n||tƒr3t|ƒ|_n|g|_t ƒ|_ |dur«|r|sHd|j|<||tƒrQt|ƒ}||_||t dƒttfƒre|ddgfvs¯||tƒrm|g}|r||tƒr~t| ¡dƒ||<ntt|dƒdƒ||<|||_dSz |d||<WdStttfyª|||<YdSwdSdSdS)NFrr¡)râÚ_ParseResults__nameÚ_ParseResults__parentÚ_ParseResults__accumNamesÚ_ParseResults__asListÚ_ParseResults__modalÚlistÚ_ParseResults__toklistÚ_generatorTypeÚdictÚ_ParseResults__tokdictrvrˆrÅÚ basestringr$rÒÚcopyÚKeyErrorÚ TypeErrorÚ IndexError)rrãrärårær}ryryrzr¯tsH " ÿîzParseResults.__init__cCsLt|ttfƒr|j|S||jvr|j|ddStdd„|j|DƒƒS)NrtrcSsg|]}|d‘qS©rry©rŠÚvryryrzÚ ¢óz,ParseResults.__getitem__..)r}rvÚslicerîrêrñr$rÙryryrzrÛ›s zParseResults.__getitem__cCs||tƒr|j |tƒ¡|g|j|<|d}n"||ttfƒr'||j|<|}n|j |tƒ¡t|dƒg|j|<|}||tƒrFt|ƒ|_ dSdSrÜ) rÒrñÚgetrírvrürîr$Úwkrefré)rÚkrùr}ÚsubryryrzÚ__setitem__¤s " ÿzParseResults.__setitem__c Cs¼t|ttfƒrXt|jƒ}|j|=t|tƒr$|dkr||7}t||dƒ}tt| |¡Žƒ}| ¡|j ¡D]\}}|D]}t|ƒD]\}\}} t|| | |kƒ||<qBq.©rr·ryr·rzÚ_itervaluesÔózParseResults._itervaluescr)Nc3s|] }|ˆ|fVqdSr‰ryrr·ryrzrŒØr‘z*ParseResults._iteritems..r!r·ryr·rzÚ _iteritems×r#zParseResults._iteritemscCót| ¡ƒS)zVReturns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x).)rírr·ryryrzÚkeysîózParseResults.keyscCr%)zXReturns all named result values (as a list in Python 2.x, as an iterator in Python 3.x).)ríÚ itervaluesr·ryryrzÚvaluesòr'zParseResults.valuescCr%)zfReturns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x).)ríÚ iteritemsr·ryryrzrör'zParseResults.itemscCr)zSince keys() returns an iterator, this method is helpful in bypassing code that looks for the existence of any defined results names.)Úboolrñr·ryryrzÚhaskeysús zParseResults.haskeyscOsˆ|sdg}| ¡D]\}}|dkr|d|f}q td|ƒ‚t|dtƒs1t|ƒdks1|d|vr>|d}||}||=|S|d}|S)a¹ Removes and returns item at specified index (default=C{last}). Supports both C{list} and C{dict} semantics for C{pop()}. If passed no argument or an integer argument, it will use C{list} semantics and pop tokens from the list of parsed tokens. If passed a non-integer argument (most likely a string), it will use C{dict} semantics and pop the corresponding value from any defined results names. A second default return value argument is supported, just as in C{dict.pop()}. Example:: def remove_first(tokens): tokens.pop(0) print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321'] print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321'] label = Word(alphas) patt = label("LABEL") + OneOrMore(Word(nums)) print(patt.parseString("AAB 123 321").dump()) # Use pop() in a parse action to remove named result (note that corresponding value is not # removed from list form of results) def remove_LABEL(tokens): tokens.pop("LABEL") return tokens patt.addParseAction(remove_LABEL) print(patt.parseString("AAB 123 321").dump()) prints:: ['AAB', '123', '321'] - LABEL: AAB ['AAB', '123', '321'] rtÚdefaultrz-pop() got an unexpected keyword argument '%s'r)rrõr}rvr)rr¬ÚkwargsrÿrùÚindexr‡ÚdefaultvalueryryrzÚpopÿs"zParseResults.popcCs||vr||S|S)ai Returns named result matching the given key, or if there is no such name, then returns the given C{defaultValue} or C{None} if no C{defaultValue} is specified. Similar to C{dict.get()}. Example:: integer = Word(nums) date_str = integer("year") + '/' + integer("month") + '/' + integer("day") result = date_str.parseString("1999/12/31") print(result.get("year")) # -> '1999' print(result.get("hour", "not specified")) # -> 'not specified' print(result.get("hour")) # -> None ry)rÚkeyÚdefaultValueryryrzrý3szParseResults.getcCsR|j ||¡|j ¡D]\}}t|ƒD]\}\}}t||||kƒ||<qqdS)a Inserts new element at location index in the list of parsed tokens. Similar to C{list.insert()}. Example:: print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321'] # use a parse action to insert the parse location in the front of the parsed results def insert_locn(locn, tokens): tokens.insert(0, locn) print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321'] N)rîÚinsertrñrrrÒ)rr/ÚinsStrrärrÿr rryryrzr4IsÿÿzParseResults.insertcCs|j |¡dS)aþ Add single element to end of ParseResults list of elements. Example:: print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321'] # use a parse action to compute the sum of the parsed integers, and add it to the end def append_sum(tokens): tokens.append(sum(map(int, tokens))) print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444] N)rîÚappend)rÚitemryryrzr6]ózParseResults.appendcCs&t|tƒr||7}dS|j |¡dS)a Add sequence of elements to end of ParseResults list of elements. Example:: patt = OneOrMore(Word(alphas)) # use a parse action to append the reverse of the matched strings, to make a palindrome def make_palindrome(tokens): tokens.extend(reversed([t[::-1] for t in tokens])) return ''.join(tokens) print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl' N)r}r$rîÚextend)rÚitemseqryryrzr9ks zParseResults.extendcCs|jdd…=|j ¡dS)z7 Clear all elements and results names. N)rîrñÚclearr·ryryrzr;}szParseResults.clearcCs z||WStyYdSwr§)rôrñrêr$©rräryryrzr¶„s ÿzParseResults.__getattr__cCs| ¡}||7}|Sr‰©ró)rÚotherr‡ryryrzÚ__add__’szParseResults.__add__csŒ|jr5t|jƒ‰‡fdd„‰|j ¡}‡fdd„|Dƒ}|D]\}}|||<t|dtƒr4t|ƒ|d_q|j|j7_|j |j¡|S)Ncs|dkrˆS|ˆSrÜry)Úa)Úoffsetryrzr{šrûz'ParseResults.__iadd__..c s4g|]\}}|D]}|t|dˆ|dƒƒf‘qqS©rr)rÒ©rŠrÿÚvlistrù)Ú addoffsetryrzrúœs ÿ ÿz)ParseResults.__iadd__..r) rñrrîrr}r$rþrérêÚupdate)rr>Ú otheritemsÚotherdictitemsrÿrùry)rErArzÚ__iadd__—s ÿ€zParseResults.__iadd__cCs"t|tƒr |dkr | ¡S||SrÜ)r}rvró©rr>ryryrzÚ__radd__§szParseResults.__radd__cCsdt|jƒt|jƒfS)Nz(%s, %s))rÝrîrñr·ryryrzr»¯ózParseResults.__repr__cCsdd dd„|jDƒ¡dS)Nú[ú, css*|]}t|tƒr t|ƒnt|ƒVqdSr‰)r}r$rˆrÝ©rŠrÚryryrzrŒ³s€(z'ParseResults.__str__..ú])r¾rîr·ryryrzr¸²szParseResults.__str__r¡cCsLg}|jD]}|r|r| |¡t|tƒr|| ¡7}q| t|ƒ¡q|Sr‰)rîr6r}r$Ú _asStringListrˆ)rÚsepÚoutr7ryryrzrQµs zParseResults._asStringListcCsdd„|jDƒS)aƒ Returns the parse results as a nested list of matching tokens, all converted to strings. Example:: patt = OneOrMore(Word(alphas)) result = patt.parseString("sldkj lsdkj sldkj") # even though the result prints in string-like form, it is actually a pyparsing ParseResults print(type(result), result) # -> ['sldkj', 'lsdkj', 'sldkj'] # Use asList() to create an actual list result_list = result.asList() print(type(result_list), result_list) # -> ['sldkj', 'lsdkj', 'sldkj'] cSs"g|] }t|tƒr | ¡n|‘qSry)r}r$rå)rŠÚresryryrzrúÎs"z'ParseResults.asList..rr·ryryrzråÀszParseResults.asListcs6tr|j}n|j}‡fdd„‰t‡fdd„|ƒDƒƒS)aÃ Returns the named parse results as a nested dictionary. Example:: integer = Word(nums) date_str = integer("year") + '/' + integer("month") + '/' + integer("day") result = date_str.parseString('12/31/1999') print(type(result), repr(result)) # -> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]}) result_dict = result.asDict() print(type(result_dict), repr(result_dict)) # -> {'day': '1999', 'year': '12', 'month': '31'} # even though a ParseResults supports dict-like access, sometime you just need to have a dict import json print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"} cs0t|tƒr| ¡r | ¡S‡fdd„|DƒS|S)Ncsg|]}ˆ|ƒ‘qSryryrø©ÚtoItemryrzrúírûz7ParseResults.asDict..toItem..)r}r$r,ÚasDict)r†rUryrzrVès z#ParseResults.asDict..toItemc3s |]\}}|ˆ|ƒfVqdSr‰ry©rŠrÿrùrUryrzrŒñó€z&ParseResults.asDict..)ÚPY_3rr*rð)rÚitem_fnryrUrzrWÐs zParseResults.asDictcCs8t|jƒ}|j ¡|_|j|_|j |j¡|j|_|S)zA Returns a new copy of a C{ParseResults} object. )r$rîrñrórérêrFrè©rr‡ryryrzróós zParseResults.copyFcCsFd}g}tdd„|j ¡Dƒƒ}|d}|sd}d}d}d} |dur%|} n|jr+|j} | s3|r1dSd} |||d| d g7}t|jƒD]S\} }t|tƒrp| |vr`|| || |oY|du||¡g7}qA|| d|oi|du||¡g7}qAd}| |vrz|| }|s|rqAd}t t |ƒƒ} |||d|d | d |d g 7}qA|||d | d g7}d |¡S)z‡ (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names. Ú css*|]\}}|D] }|d|fVqqdS©rNryrCryryrzrŒs€ ÿÿz%ParseResults.asXML..ú r¡NÚITEMú<ú>ú.z %s%s- %s: r_rcsó|]}t|tƒVqdSr‰)r}r$)rŠÚvvryryrzrŒŠó€z %s%s[%d]: %s%s%sr¡) r6rˆrår,Úsortedrr}r$ÚdumprÝÚanyrr¾)rrgÚdepthÚfullrSÚNLrrÿrùrÚruryryrzrxgs. ö 4, zParseResults.dumpcOs tj| ¡g|¢Ri|¤ŽdS)aõ Pretty-printer for parsed results as a list, using the C{pprint} module. Accepts additional positional or keyword args as defined for the C{pprint.pprint} method. (U{http://docs.python.org/3/library/pprint.html#pprint.pprint}) Example:: ident = Word(alphas, alphanums) num = Word(nums) func = Forward() term = ident | num | Group('(' + func + ')') func <<= ident + Group(Optional(delimitedList(term))) result = func.parseString("fna a,b,(fnb c,d,200),100") result.pprint(width=40) prints:: ['fna', ['a', 'b', ['(', 'fnb', ['c', 'd', '200'], ')'], '100']] N)Úpprintrå©rr¬r.ryryrzr}”s zParseResults.pprintcCs.|j|j ¡|jdur| ¡pd|j|jffSr‰)rîrñrórérêrèr·ryryrzÚ__getstate__¬sýÿzParseResults.__getstate__cCsP|d|_|d\|_}}|_i|_|j |¡|dur#t|ƒ|_dSd|_dSr)rîrñrèrêrFrþré)rÚstaterrÚinAccumNamesryryrzÚ__setstate__³s ý zParseResults.__setstate__cCs|j|j|j|jfSr‰)rîrèrërìr·ryryrzÚ__getnewargs__ÀrÇzParseResults.__getnewargs__cCstt|ƒƒt| ¡ƒSr‰)rÄrÅrír&r·ryryrzrÆÃrLzParseResults.__dir__)NNTTr‰©r¡)NFr¡T)r¡rT)4rœrržrÈrár}r¯rÛrrrrrÚ__nonzero__rrrr"r$rZr&r)rrr(r*r,r1rýr4r6r9r;r¶r?rIrKr»r¸rQrårWrórdrprsrxr}rr‚rƒrÆryryryrzr$Dst & ' 4 # = %- r$cCsF|}d|krt|ƒkrnn ||ddkrdS|| dd|¡S)aReturns current column within a string, counting newlines as line separators. The first column is number 1. Note: the default parsing behavior is to expand tabs in the input string before starting the parsing process. See L{I{ParserElement.parseString}} for more information on parsing strings containing C{}s, and suggested methods to maintain a consistent view of the parsed string, the parse location, and line and column positions within the parsed string. rrr])rÚrfind)r¨Ústrgrryryrzr;Ès Br;cCs| dd|¡dS)aReturns current line number within a string, counting newlines as line separators. The first line is number 1. Note: the default parsing behavior is to expand tabs in the input string before starting the parsing process. See L{I{ParserElement.parseString}} for more information on parsing strings containing C{}s, and suggested methods to maintain a consistent view of the parsed string, the parse location, and line and column positions within the parsed string. r]rr)Úcount)r¨r‡ryryrzrLÕs rLcCsB| dd|¡}| d|¡}|dkr||d|…S||dd…S)zfReturns the line of text containing loc within a string, counting newlines as line separators. r]rrN)r†Úfind)r¨r‡ÚlastCRÚnextCRryryrzrIás rIcCs8tdt|ƒdt|ƒdt||ƒt||ƒfƒdS)NzMatch z at loc z(%d,%d))ÚprintrˆrLr;)Úinstringr¨ÚexprryryrzÚ_defaultStartDebugActionës8rcCs$tdt|ƒdt| ¡ƒƒdS)NzMatched z -> )rŒrˆrrå)rÚstartlocÚendlocrŽÚtoksryryrzÚ_defaultSuccessDebugActionîs$r“cCstdt|ƒƒdS)NzException raised:)rŒrˆ)rr¨rŽÚexcryryrzÚ_defaultExceptionDebugActionñrÇr•cGódS)zG'Do-nothing' debug action, to suppress debugging output during parsing.Nry)r¬ryryrzrSôsrSrscsÐˆtvr ‡fdd„Sdg‰dg‰tdd…dkr#ddd„}dd d „‰ntj}tj‰d}|ddd }|d|d|f‰‡‡‡‡‡‡fdd„}d}ztˆdtˆdƒjƒ}Wn tybtˆƒ}Ynw||_|S)Ncsˆ|ƒSr‰ry©rÚlrx)Úfuncryrzr{óz_trim_arity..rFrs)rqécSs8tdkrdnd}tj||dd|}|dd…gS)N)rqr›réýÿÿÿéþÿÿÿr©Úlimitrs)Úsystem_versionÚ tracebackÚ extract_stack)rŸrAÚ frame_summaryryryrzr¢sz"_trim_arity..extract_stackcSs$tj||d}|d}|dd…gS)Nržrtrs)r¡Ú extract_tb)ÚtbrŸÚframesr£ryryrzr¤sz_trim_arity..extract_tbéržrtrc s– zˆ|ˆdd…Ž}dˆd<|WStyJˆdr‚zt ¡d}ˆ|ddddd…ˆks4‚W~n~wˆdˆkrIˆdd7<Yq‚w)NrrTrtrsrž)rõr‚Úexc_info)r¬r‡r¥©r¤Ú foundArityr™rŸÚmaxargsÚpa_call_line_synthryrzÚwrapper-s&ÿñz_trim_arity..wrapperzrœÚ __class__r÷) ÚsingleArgBuiltinsr r¡r¢r¤ÚgetattrrœÚ Exceptionr)r™r«r¢Ú LINE_DIFFÚ this_linerÚ func_nameryr©rzÚ_trim_aritys. ÿÿrµcs’eZdZdZdZdZedd„ƒZedd„ƒZd†dd „Z d d„Z dd „Zd†dd„Zd‡dd„Z dd„Zdd„Zdd„Zdd„Zdd„Zdd„Zd‡dd „Zd!d"„Zdˆd#d$„Zd%d&„Zd'd(„ZGd)d*„d*eƒZed+urpGd,d-„d-eƒZnGd.d-„d-eƒZiZeƒZd/d/gZ dˆd0d1„Z!eZ"ed2d3„ƒZ#dZ$ed‰d5d6„ƒZ%d†d7d8„Z&e'dfd9d:„Z(d;d<„Z)e'fd=d>„Z*e'dfd?d@„Z+dAdB„Z,dCdD„Z-dEdF„Z.dGdH„Z/dIdJ„Z0dKdL„Z1dMdN„Z2dOdP„Z3dQdR„Z4dSdT„Z5dUdV„Z6dWdX„Z7dYdZ„Z8dŠd[d\„Z9d]d^„Z:d_d`„Z;dadb„Zdgdh„Z?d‡didj„Z@dkdl„ZAdmdn„ZBdodp„ZCdqdr„ZDgfdsdt„ZEd†dudv„ZF‡fdwdx„ZGdydz„ZHd{d|„ZId}d~„ZJdd€„ZKd‡dd‚„ZLd‹d„d…„ZM‡ZNS)Œr&z)Abstract base level parser element class.z FcCó |t_dS)aÑ Overrides the default whitespace chars Example:: # default whitespace chars are space, and newline OneOrMore(Word(alphas)).parseString("abc def\nghi jkl") # -> ['abc', 'def', 'ghi', 'jkl'] # change to just treat newline as significant ParserElement.setDefaultWhitespaceChars(" \t") OneOrMore(Word(alphas)).parseString("abc def\nghi jkl") # -> ['abc', 'def'] N)r&ÚDEFAULT_WHITE_CHARS©ÚcharsryryrzÚsetDefaultWhitespaceCharsTs z'ParserElement.setDefaultWhitespaceCharscCr¶)a… Set class to be used for inclusion of string literals into a parser. Example:: # default literal class used is Literal integer = Word(nums) date_str = integer("year") + '/' + integer("month") + '/' + integer("day") date_str.parseString("1999/12/31") # -> ['1999', '/', '12', '/', '31'] # change to Suppress ParserElement.inlineLiteralsUsing(Suppress) date_str = integer("year") + '/' + integer("month") + '/' + integer("day") date_str.parseString("1999/12/31") # -> ['1999', '12', '31'] N)r&Ú_literalStringClass)r°ryryrzÚinlineLiteralsUsingcs z!ParserElement.inlineLiteralsUsingcCs‚tƒ|_d|_d|_d|_||_d|_tj|_ d|_ d|_d|_tƒ|_ d|_d|_d|_d|_d|_d|_d|_d|_d|_dS)NTFr¡)NNN)ríÚparseActionÚ failActionÚstrReprÚresultsNameÚ saveAsListÚskipWhitespacer&r·Ú whiteCharsÚcopyDefaultWhiteCharsÚmayReturnEmptyÚkeepTabsÚignoreExprsÚdebugÚstreamlinedÚ mayIndexErrorÚerrmsgÚmodalResultsÚdebugActionsÚreÚcallPreparseÚ callDuringTry)rÚsavelistryryrzr¯xs( zParserElement.__init__cCs<t |¡}|jdd…|_|jdd…|_|jrtj|_|S)a$ Make a copy of this C{ParserElement}. Useful for defining different parse actions for the same parsing pattern, using copies of the original parse element. Example:: integer = Word(nums).setParseAction(lambda toks: int(toks[0])) integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K") integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M") print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M")) prints:: [5120, 100, 655360, 268435456] Equivalent form of C{expr.copy()} is just C{expr()}:: integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M") N)rór½rÇrÄr&r·rÃ)rÚcpyryryrzrós zParserElement.copycCs*||_d|j|_t|dƒr|j|j_|S)af Define name for this expression, makes debugging and exception messages clearer. Example:: Word(nums).parseString("ABC") # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1) Word(nums).setName("integer").parseString("ABC") # -> Exception: Expected integer (at char 0), (line:1, col:1) ú Expected Ú exception)rärËrrÔr©r<ryryrzÚsetName¦s zParserElement.setNamecCs4| ¡}| d¡r|dd…}d}||_||_|S)aP Define name for referencing matching tokens as a nested attribute of the returned parse results. NOTE: this returns a *copy* of the original C{ParserElement} object; this is so that the client can define a basic element, such as an integer, and reference it in multiple places with different names. You can also set results names using the abbreviated syntax, C{expr("name")} in place of C{expr.setResultsName("name")} - see L{I{__call__}<__call__>}. Example:: date_str = (integer.setResultsName("year") + '/' + integer.setResultsName("month") + '/' + integer.setResultsName("day")) # equivalent form: date_str = integer("year") + '/' + integer("month") + '/' + integer("day") Ú*NrtT)róÚendswithrÀrÌ)rräÚlistAllMatchesÚnewselfryryrzÚsetResultsName´s zParserElement.setResultsNameTcsB|r|j‰d‡fdd„ }ˆ|_||_|St|jdƒr|jj|_|S)z¦Method to invoke the Python pdb debugger when this element is about to be parsed. Set C{breakFlag} to True to enable, False to disable. Tcsddl}| ¡ˆ||||ƒSrÜ)ÚpdbÚ set_trace)rr¨Ú doActionsÚcallPreParserÛ©Ú_parseMethodryrzÚbreaker×sz'ParserElement.setBreak..breakerÚ_originalParseMethodN©TT)Ú_parserâr)rÚ breakFlagráryrßrzÚsetBreakÐsþ zParserElement.setBreakcOs&tttt|ƒƒƒ|_| dd¡|_|S)a Define one or more actions to perform when successfully matching parse element definition. Parse action fn is a callable method with 0-3 arguments, called as C{fn(s,loc,toks)}, C{fn(loc,toks)}, C{fn(toks)}, or just C{fn()}, where: - s = the original string being parsed (see note below) - loc = the location of the matching substring - toks = a list of the matched tokens, packaged as a C{L{ParseResults}} object If the functions in fns modify the tokens, they can return them as the return value from fn, and the modified list of tokens will replace the original. Otherwise, fn does not need to return any value. Optional keyword arguments: - callDuringTry = (default=C{False}) indicate if parse action should be run during lookaheads and alternate testing Note: the default parsing behavior is to expand tabs in the input string before starting the parsing process. See L{I{parseString}} for more information on parsing strings containing C{}s, and suggested methods to maintain a consistent view of the parsed string, the parse location, and line and column positions within the parsed string. Example:: integer = Word(nums) date_str = integer + '/' + integer + '/' + integer date_str.parseString("1999/12/31") # -> ['1999', '/', '12', '/', '31'] # use parse action to convert to ints at parse time integer = Word(nums).setParseAction(lambda toks: int(toks[0])) date_str = integer + '/' + integer + '/' + integer # note that integer fields are now ints, not strings date_str.parseString("1999/12/31") # -> [1999, '/', 12, '/', 31] rÐF)ríÚmaprµr½rýrÐ©rÚfnsr.ryryrzr„âs"zParserElement.setParseActioncOs4|jtttt|ƒƒƒ7_|jp| dd¡|_|S)z³ Add one or more parse actions to expression's list of parse actions. See L{I{setParseAction}}. See examples in L{I{copy}}. rÐF)r½rírçrµrÐrýrèryryrzÚaddParseActionszParserElement.addParseActioncs^| dd¡‰| dd¡rtnt‰|D]‰‡‡‡fdd„}|j |¡q|jp+| dd¡|_|S)aÓAdd a boolean predicate function to expression's list of parse actions. See L{I{setParseAction}} for function call signatures. Unlike C{setParseAction}, functions passed to C{addCondition} need to return boolean success/fail of the condition. Optional keyword arguments: - message = define a custom message to be used in the raised exception - fatal = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException Example:: integer = Word(nums).setParseAction(lambda toks: int(toks[0])) year_int = integer.copy() year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later") date_str = year_int + '/' + integer + '/' + integer result = date_str.parseString("1999/12/31") # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1) Úmessagezfailed user-defined conditionÚfatalFcs$ttˆƒ|||ƒƒsˆ||ˆƒ‚dSr‰)r+rµr—©Úexc_typeÚfnr©ryrzÚpa&sÿz&ParserElement.addCondition..parÐ)rýr#r!r½r6rÐ)rrér.rðryrírzÚaddConditionszParserElement.addConditioncCs ||_|S)aDefine action to perform if parsing fails at this expression. Fail acton fn is a callable function that takes the arguments C{fn(s,loc,expr,err)} where: - s = string being parsed - loc = location where expression match was attempted and failed - expr = the parse expression that failed - err = the exception thrown The function returns no value. It may throw C{L{ParseFatalException}} if it is desired to stop parsing immediately.)r¾)rrïryryrzÚ setFailAction-s zParserElement.setFailActionc CsJd}|r#d}|jD]}z | ||¡\}}d}q ty Yq w|s|S©NTF)rÇrär!)rrr¨Ú exprsFoundÚeÚdummyryryrzÚ_skipIgnorables:s þÿù zParserElement._skipIgnorablescCsZ|jr | ||¡}|jr+|j}t|ƒ}||kr+|||vr+|d7}||kr+|||vs|S©Nr)rÇr÷rÂrÃr)rrr¨ÚwtÚinstrlenryryrzÚpreParseGsÿzParserElement.preParsecCs|gfSr‰ry©rrr¨rÝryryrzÚ parseImplSr¼zParserElement.parseImplcCs|Sr‰ry©rrr¨Ú tokenlistryryrzÚ postParseVózParserElement.postParsec Cs–|j}|s|jrm|jdr|jd|||ƒ|r"|jr"| ||¡}n|}|}zz| |||¡\}}WntyCt|t|ƒ|j |ƒ‚wWnft yl} z|jdr\|jd|||| ƒ|jrg| |||| ¡‚d} ~ ww|ry|jry| ||¡}n|}|}|js†|t|ƒkr£z| |||¡\}}Wnty¢t|t|ƒ|j |ƒ‚w| |||¡\}}| |||¡}t ||j|j|jd} |jr3|sÈ|jr3|rz$|jD]}|||| ƒ}|durít ||j|joèt|t tfƒ|jd} qÏWnCt y } z|jdr|jd|||| ƒ‚d} ~ ww|jD]!}|||| ƒ}|dur1t ||j|jo,t|t tfƒ|jd} q|rG|jdrG|jd||||| ƒ|| fS)Nrrs)rårær)rÈr¾rÍrÏrûrýrör!rrËrrÊrr$rÀrÁrÌr½rÐr}rí)rrr¨rÝrÞÚ debuggingÚprelocÚtokensStartÚtokensÚerrÚ retTokensrïryryrzÚ _parseNoCacheZsˆ ÿÿ €ú ÿ ý€ý€ü ý€zParserElement._parseNoCachecCs6z|j||dddWStyt|||j|ƒ‚w)NF)rÝr)rär#r!rË©rrr¨ryryrzÚtryParse¡s ÿzParserElement.tryParsec Cs,z | ||¡WdSttfyYdSw)NFT)r r!rör ryryrzÚcanParseNext§sýÿzParserElement.canParseNextc@óeZdZdd„ZdS)zParserElement._UnboundedCachecs~i‰tƒ|_‰‡‡fdd„}‡fdd„}‡fdd„}‡fdd„}t ||¡|_t ||¡|_t ||¡|_t ||¡|_dS) Ncóˆ |ˆ¡Sr‰©rý©rr2©ÚcacheÚnot_in_cacheryrzrý´óz3ParserElement._UnboundedCache.__init__..getcs|ˆ|<dSr‰ry©rr2r ©rryrzÚset·rz3ParserElement._UnboundedCache.__init__..setcóˆ ¡dSr‰©r;r·rryrzr;ºrz5ParserElement._UnboundedCache.__init__..clearcótˆƒSr‰©rr·rryrzÚ cache_len½r¼z9ParserElement._UnboundedCache.__init__..cache_len)ràrÚtypesÚ MethodTyperýrr;r)rrýrr;rryrrzr¯°sz&ParserElement._UnboundedCache.__init__N©rœrržr¯ryryryrzÚ_UnboundedCache¯órNc@r)úParserElement._FifoCachecs‚tƒ|_‰tƒ‰‡‡fdd„}‡‡fdd„}‡fdd„}‡fdd„}t ||¡|_t ||¡|_t ||¡|_t ||¡|_dS) Ncr r‰rrrryrzrýÌrú.ParserElement._FifoCache.__init__..getcsJ|ˆ|<tˆƒˆkr#zˆ d¡Wn tyYnwtˆƒˆks dSdS©NF)rÚpopitemrôr)rÚsizeryrzrÏsÿýú.ParserElement._FifoCache.__init__..setcrr‰rr·rryrzr;×rú0ParserElement._FifoCache.__init__..clearcrr‰rr·rryrzrÚr¼ú4ParserElement._FifoCache.__init__..cache_len) ràrÚ_OrderedDictrrrýrr;r©rr%rýrr;rry)rrr%rzr¯Çsú!ParserElement._FifoCache.__init__NrryryryrzÚ _FifoCacheÆr r,c@r)r!cstƒ|_‰i‰t gˆ¡‰‡‡fdd„}‡‡‡fdd„}‡‡fdd„}‡fdd„}t ||¡|_t ||¡|_t ||¡|_t ||¡|_ dS) Ncr r‰rrrryrzrýêrr"cs>|ˆ|<tˆƒˆkrˆ ˆ ¡d¡tˆƒˆks ˆ |¡dSr‰)rr1Úpopleftr6r)rÚkey_fifor%ryrzrís ÿr&csˆ ¡ˆ ¡dSr‰rr·)rr.ryrzr;ósr'crr‰rr·rryrzr÷r¼r() ràrÚcollectionsÚdequerrrýrr;rr*ry)rr.rr%rzr¯äsr+Nrryryryrzr,ãr rcCsd\}}|||||f}tjqtj}| |¡} | |jur^tj|d7<z | ||||¡} WntyF} z| || j | j Ž¡‚d} ~ ww| || d| d ¡f¡| WdƒStj|d7<t| t ƒrn| ‚| d| d ¡fWdƒS1s‚wYdS)NrBrr)r&Úpackrat_cache_lockÚ packrat_cacherýrÚpackrat_cache_statsrrrr®r¬rór}r±)rrr¨rÝrÞÚHITÚMISSÚlookuprr r±ryryrzÚ_parseCaches, €ýó $îzParserElement._parseCachecCs(tj ¡dgttjƒtjdd…<dSrÜ)r&r2r;rr3ryryryrzÚ resetCaches zParserElement.resetCacheé€cCs<tjsdt_|durt ¡t_nt |¡t_tjt_dSdS)a–Enables "packrat" parsing, which adds memoizing to the parsing logic. Repeated parse attempts at the same string location (which happens often in many complex grammars) can immediately return a cached value, instead of re-executing parsing/validating code. Memoizing is done of both valid results and parsing exceptions. Parameters: - cache_size_limit - (default=C{128}) - if an integer value is provided will limit the size of the packrat cache; if None is passed, then the cache size will be unbounded; if 0 is passed, the cache will be effectively disabled. This speedup may break existing programs that use parse actions that have side-effects. For this reason, packrat parsing is disabled when you first import pyparsing. To activate the packrat feature, your program must call the class method C{ParserElement.enablePackrat()}. If your program uses C{psyco} to "compile as you go", you must call C{enablePackrat} before calling C{psyco.full()}. If you do not do this, Python will crash. For best results, call C{enablePackrat()} immediately after importing pyparsing. Example:: import pyparsing pyparsing.ParserElement.enablePackrat() TN)r&Ú_packratEnabledrr2r,r7rä)Úcache_size_limitryryrzÚ enablePackrat%súzParserElement.enablePackratc Cs¢t ¡|js| ¡|jD]}| ¡q|js| ¡}z"| |d¡\}}|r<| ||¡}t ƒt ƒ}| ||¡W|SW|StyP}ztjrJ‚|‚d}~ww)aC Execute the parse expression with the given string. This is the main interface to the client code, once the complete expression has been built. If you want the grammar to require that the entire input string be successfully parsed, then set C{parseAll} to True (equivalent to ending the grammar with C{L{StringEnd()}}). Note: C{parseString} implicitly calls C{expandtabs()} on the input string, in order to report proper column numbers in parse actions. If the input string contains tabs and the grammar uses parse actions that use the C{loc} argument to index into the string being parsed, you can ensure you have a consistent view of the input string by: - calling C{parseWithTabs} on your grammar before calling C{parseString} (see L{I{parseWithTabs}}) - define your parse action using the full C{(s,loc,toks)} signature, and reference the input string using the parse action's C{s} argument - explicitly expand the tabs in your input string before calling C{parseString} Example:: Word('a').parseString('aaaaabaaa') # -> ['aaaaa'] Word('a').parseString('aaaaabaaa', parseAll=True) # -> Exception: Expected end of text rN) r&r8rÉÚ streamlinerÇrÆÚ expandtabsrärûrr+rÚverbose_stacktrace)rrÚparseAllrõr¨rÚser”ryryrzÚparseStringHs, õù€ûzParserElement.parseStringc csD|js| ¡|jD]}| ¡q|jst|ƒ ¡}t|ƒ}d}|j}|j}t ¡d} zb||kr‡| |krŠz|||ƒ} ||| dd\}}Wn tyS| d}Yn)w||krx| d7} || |fV|ru|||ƒ} | |krp|}n|d7}n|}n| d}||kr| |ks6WdSWdSWdSWdSty¡}zt j r›‚|‚d}~ww)a† Scan the input string for expression matches. Each match will return the matching tokens, start location, and end location. May be called with optional C{maxMatches} argument, to clip scanning after 'n' matches are found. If C{overlap} is specified, then overlapping matches will be reported. Note that the start and end locations are reported relative to the string being parsed. See L{I{parseString}} for more information on parsing strings with embedded tabs. Example:: source = "sldjf123lsdjjkf345sldkjf879lkjsfd987" print(source) for tokens,start,end in Word(alphas).scanString(source): print(' '*start + '^'*(end-start)) print(' '*start + tokens[0]) prints:: sldjf123lsdjjkf345sldkjf879lkjsfd987 ^^^^^ sldjf ^^^^^^^ lsdjjkf ^^^^^^ sldkjf ^^^^^^ lkjsfd rF©rÞrN)rÉr=rÇrÆrˆr>rrûrär&r8r!rr?)rrÚ maxMatchesÚoverlaprõrúr¨Ú preparseFnÚparseFnÚmatchesrÚnextLocrÚnextlocr”ryryrzÚ scanStringzsL€ ÿ (í€ûzParserElement.scanStringc CsÐg}d}d|_zN| |¡D]-\}}}| |||…¡|r8t|tƒr)|| ¡7}nt|tƒr3||7}n| |¡|}q | ||d…¡dd„|Dƒ}d tt t |ƒƒ¡WStyg}ztj ra‚|‚d}~ww)af Extension to C{L{scanString}}, to modify matching text with modified tokens that may be returned from a parse action. To use C{transformString}, define a grammar and attach a parse action to it that modifies the returned token list. Invoking C{transformString()} on a target string will then scan for matches, and replace the matched text patterns according to the logic in the parse action. C{transformString()} returns the resulting transformed string. Example:: wd = Word(alphas) wd.setParseAction(lambda toks: toks[0].title()) print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york.")) Prints:: Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York. rTNcSsg|]}|r|‘qSryry)rŠÚoryryrzrúãrûz1ParserElement.transformString..r¡)rÆrKr6r}r$rårír¾rçrˆÚ_flattenrr&r?)rrrSÚlastErxrrõr”ryryrzr…Ás, €ûzParserElement.transformStringc CsBztdd„| ||¡DƒƒWSty }ztjr‚|‚d}~ww)a Another extension to C{L{scanString}}, simplifying the access to the tokens found to match the given parse expression. May be called with optional C{maxMatches} argument, to clip searching after 'n' matches are found. Example:: # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters cap_word = Word(alphas.upper(), alphas.lower()) print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")) # the sum() builtin can be used to merge results into a single ParseResults object print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))) prints:: [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']] ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity'] cSsg|]\}}}|‘qSryry)rŠrxrrõryryrzrúÿóz.ParserElement.searchString..N)r$rKrr&r?)rrrDr”ryryrzÚsearchStringìs€ûzParserElement.searchStringc csVd}d}|j||dD]\}}}|||…V|r|dV|}q||d…VdS)a[ Generator method to split a string using the given expression as a separator. May be called with optional C{maxsplit} argument, to limit the number of splits; and the optional C{includeSeparators} argument (default=C{False}), if the separating matching text should be included in the split results. Example:: punc = oneOf(list(".,;:/-!?")) print(list(punc.split("This, this?, this sentence, is badly punctuated!"))) prints:: ['This', ' this', '', ' this sentence', ' is badly punctuated', ''] r)rDN)rK) rrÚmaxsplitÚincludeSeparatorsÚsplitsÚlastrxrrõryryrzr’s€ zParserElement.splitcCóFt|tƒr t |¡}t|tƒstjdt|ƒtdddSt||gƒS)a– Implementation of + operator - returns C{L{And}}. Adding strings to a ParserElement converts them to L{Literal}s by default. Example:: greet = Word(alphas) + "," + Word(alphas) + "!" hello = "Hello, World!" print (hello, "->", greet.parseString(hello)) Prints:: Hello, World! -> ['Hello', ',', 'World', '!'] ú4Cannot combine element of type %s with ParserElementrs©Ú stacklevelN) r}ròr&r»ÚwarningsÚwarnrÅÚ SyntaxWarningrrJryryrzr?s ÿzParserElement.__add__cCsBt|tƒr t |¡}t|tƒstjdt|ƒtdddS||S)z] Implementation of + operator when left operand is not a C{L{ParserElement}} rVrsrWN©r}ròr&r»rYrZrÅr[rJryryrzrK1ó ÿzParserElement.__radd__cCsJt|tƒr t |¡}t|tƒstjdt|ƒtdddS|t ¡|S)zQ Implementation of - operator, returns C{L{And}} with error stop rVrsrWN) r}ròr&r»rYrZrÅr[rÚ _ErrorStoprJryryrzÚ__sub__=s ÿzParserElement.__sub__cCsBt|tƒr t |¡}t|tƒstjdt|ƒtdddS||S)z] Implementation of - operator when left operand is not a C{L{ParserElement}} rVrsrWNr\rJryryrzÚ__rsub__Ir]zParserElement.__rsub__cs¨t|tƒr|d}}npt|tƒrt|ddd…}|ddur$d|df}t|dtƒrO|ddurO|ddkr;tˆƒS|ddkrEtˆƒSˆ|dtˆƒSt|dtƒrft|dtƒrf|\}}||8}ntdt|dƒt|dƒƒ‚tdt|ƒƒ‚|dkrƒtdƒ‚|dkr‹td ƒ‚||kr˜dkr™td ƒ‚|rÃ‡‡fdd„‰|r½|dkr°ˆˆ|ƒ}|Stˆg|ƒˆ|ƒ}|Sˆ|ƒ}|S|dkrËˆ}|Stˆg|ƒ}|S) aå Implementation of * operator, allows use of C{expr * 3} in place of C{expr + expr + expr}. Expressions may also me multiplied by a 2-integer tuple, similar to C{{min,max}} multipliers in regular expressions. Tuples may also include C{None} as in: - C{expr*(n,None)} or C{expr*(n,)} is equivalent to C{expr*n + L{ZeroOrMore}(expr)} (read as "at least n instances of C{expr}") - C{expr*(None,n)} is equivalent to C{expr*(0,n)} (read as "0 to n instances of C{expr}") - C{expr*(None,None)} is equivalent to C{L{ZeroOrMore}(expr)} - C{expr*(1,None)} is equivalent to C{L{OneOrMore}(expr)} Note that C{expr*(None,n)} does not raise an exception if more than n exprs exist in the input stream; that is, C{expr*(None,n)} does not enforce a maximum number of expr occurrences. If this behavior is desired, then write C{expr*(None,n) + ~expr} r)NNNrsrz7cannot multiply 'ParserElement' and ('%s','%s') objectsz0cannot multiply 'ParserElement' and '%s' objectsz/cannot multiply ParserElement by negative valuez@second tuple value must be greater or equal to first tuple valuez+cannot multiply ParserElement by 0 or (0,0)cs$|dkrtˆˆ|dƒƒStˆƒSrø)r©Ún©ÚmakeOptionalListrryrzrd†sz/ParserElement.__mul__..makeOptionalList) r}rvÚtupler4rrõrÅÚ ValueErrorr)rr>ÚminElementsÚoptElementsr‡ryrcrzÚ__mul__UsN ÿ øúüÿzParserElement.__mul__cCs | |¡Sr‰)rirJryryrzÚ__rmul__™rÑzParserElement.__rmul__cCrU)zI Implementation of | operator - returns C{L{MatchFirst}} rVrsrWN) r}ròr&r»rYrZrÅr[rrJryryrzÚ__or__œó ÿzParserElement.__or__cCsBt|tƒr t |¡}t|tƒstjdt|ƒtdddS||BS)z] Implementation of | operator when left operand is not a C{L{ParserElement}} rVrsrWNr\rJryryrzÚ__ror__¨r]zParserElement.__ror__cCrU)zA Implementation of ^ operator - returns C{L{Or}} rVrsrWN) r}ròr&r»rYrZrÅr[rrJryryrzÚ__xor__´rlzParserElement.__xor__cCsBt|tƒr t |¡}t|tƒstjdt|ƒtdddS||AS)z] Implementation of ^ operator when left operand is not a C{L{ParserElement}} rVrsrWNr\rJryryrzÚ__rxor__Àr]zParserElement.__rxor__cCrU)zC Implementation of & operator - returns C{L{Each}} rVrsrWN) r}ròr&r»rYrZrÅr[rrJryryrzÚ__and__ÌrlzParserElement.__and__cCsBt|tƒr t |¡}t|tƒstjdt|ƒtdddS||@S)z] Implementation of & operator when left operand is not a C{L{ParserElement}} rVrsrWNr\rJryryrzÚ__rand__Ør]zParserElement.__rand__cCr¹)zE Implementation of ~ operator - returns C{L{NotAny}} )rr·ryryrzÚ __invert__äszParserElement.__invert__cCs|dur | |¡S| ¡S)a Shortcut for C{L{setResultsName}}, with C{listAllMatches=False}. If C{name} is given with a trailing C{'*'} character, then C{listAllMatches} will be passed as C{True}. If C{name} is omitted, same as calling C{L{copy}}. Example:: # these are equivalent userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno") userdata = Word(alphas)("name") + Word(nums+"-")("socsecno") N)rÚrór<ryryrzÚ__call__ês zParserElement.__call__cCr¹)zˆ Suppresses the output of this C{ParserElement}; useful to keep punctuation from cluttering up returned output. )r-r·ryryrzÚsuppressýszParserElement.suppresscCó d|_|S)a Disables the skipping of whitespace before matching the characters in the C{ParserElement}'s defined pattern. This is normally only used internally by the pyparsing module, but may be needed in some whitespace-sensitive grammars. F©rÂr·ryryrzÚleaveWhitespaceózParserElement.leaveWhitespacecCsd|_||_d|_|S)z8 Overrides the default whitespace chars TF)rÂrÃrÄ)rr¹ryryrzÚsetWhitespaceChars sz ParserElement.setWhitespaceCharscCru)zé Overrides default behavior to expand C{}s to spaces before parsing the input string. Must be called before C{parseString} when the input grammar contains elements that match C{} characters. T)rÆr·ryryrzÚ parseWithTabsrxzParserElement.parseWithTabscCsNt|tƒr t|ƒ}t|tƒr||jvr|j |¡|S|j t| ¡ƒ¡|S)a× Define expression to be ignored (e.g., comments) while doing pattern matching; may be called repeatedly, to define multiple comment or other ignorable patterns. Example:: patt = OneOrMore(Word(alphas)) patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj'] patt.ignore(cStyleComment) patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd'] )r}ròr-rÇr6rórJryryrzÚignores ÿzParserElement.ignorecCs"|pt|pt|p tf|_d|_|S)zT Enable display of debugging messages while doing pattern matching. T)rr“r•rÍrÈ)rÚstartActionÚ successActionÚexceptionActionryryrzÚsetDebugActions6sþzParserElement.setDebugActionscCs |r| ttt¡|Sd|_|S)aŽ Enable display of debugging messages while doing pattern matching. Set C{flag} to True to enable, False to disable. Example:: wd = Word(alphas).setName("alphaword") integer = Word(nums).setName("numword") term = wd | integer # turn on debugging for wd wd.setDebug() OneOrMore(term).parseString("abc 123 xyz 890") prints:: Match alphaword at loc 0(1,1) Matched alphaword -> ['abc'] Match alphaword at loc 3(1,4) Exception raised:Expected alphaword (at char 4), (line:1, col:5) Match alphaword at loc 7(1,8) Matched alphaword -> ['xyz'] Match alphaword at loc 11(1,12) Exception raised:Expected alphaword (at char 12), (line:1, col:13) Match alphaword at loc 15(1,16) Exception raised:Expected alphaword (at char 15), (line:1, col:16) The output shown is that produced by the default debug actions - custom debug actions can be specified using L{setDebugActions}. Prior to attempting to match the C{wd} expression, the debugging message C{"Match at loc (,)"} is shown. Then if the parse succeeds, a C{"Matched"} message is shown, or an C{"Exception raised"} message is shown. Also note the use of L{setName} to assign a human-readable name to the expression, which makes debugging and exception messages easier to understand - for instance, the default name created for the C{Word} expression without calling C{setName} is C{"W:(ABCD...)"}. F)rrr“r•rÈ)rÚflagryryrzÚsetDebug@s #ÿzParserElement.setDebugcCs|jSr‰)rär·ryryrzr¸iózParserElement.__str__cCr¹r‰rºr·ryryrzr»lr¼zParserElement.__repr__cCsd|_d|_|Srß)rÉr¿r·ryryrzr=oszParserElement.streamlinecCsdSr‰ryrÏryryrzÚcheckRecursiontrzParserElement.checkRecursioncCs| g¡dS)zj Check defined expressions for valid structure, check for infinite recursive definitions. N)rƒ)rÚ validateTraceryryrzÚvalidatewszParserElement.validatecCs†z| ¡}Wn"ty(t|dƒ}| ¡}Wdƒn1s!wYYnwz| ||¡WStyB}ztjr<‚|‚d}~ww)zÐ Execute the parse expression on the given file or filename. If a filename is specified (instead of a file object), the entire file is opened, read, and closed before parsing. ÚrN)Úreadr´ÚopenrBrr&r?)rÚfile_or_filenamer@Ú file_contentsÚfr”ryryrzÚ parseFile}s ÿ€ÿ€ûzParserElement.parseFilecsDt|tƒr||upt|ƒt|ƒkSt|tƒr| |¡Stt|ƒ|kSr‰)r}r&ÚvarsròrHÚsuperrJ©r®ryrzÚ__eq__‘s zParserElement.__eq__cCó ||kSr‰ryrJryryrzÚ__ne__™rÑzParserElement.__ne__cCstt|ƒƒSr‰)ÚhashÚidr·ryryrzÚ__hash__œrzParserElement.__hash__cCó||kSr‰ryrJryryrzÚ__req__Ÿr¼zParserElement.__req__cCr‘r‰ryrJryryrzÚ__rne__¢rÑzParserElement.__rne__cCs.z|jt|ƒ|dWdStyYdSw)aÓ Method for quick testing of a parser against a test string. Good for simple inline microtests of sub expressions while building up larger parser. Parameters: - testString - to test against this expression for a match - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests Example:: expr = Word(nums) assert expr.matches("100") ©r@TF)rBrˆr)rÚ testStringr@ryryrzrH¥s ÿzParserElement.matchesú#cCsæt|tƒrtttj| ¡ ¡ƒƒ}t|tƒrt|ƒ}g}g}d} |D]Ì} |dur.| | d¡s2|r8| s8| | ¡q"| s;q"d |¡| g}g}z| dd¡} |j | |d}| |j|d¡| o_|} Wnuty¶} zIt| tƒrpdnd }d| vr‘| t| j| ƒ¡| d t| j| ƒdd|¡n| d | jd|¡| d t| ƒ¡| o©|} | }WYd} ~ n%d} ~ wtyÖ}z| dt|ƒ¡| oÉ|} |}WYd}~nd}~ww|rç|rà| d ¡td |¡ƒ| | |f¡q"| |fS)a3 Execute the parse expression on a series of test strings, showing each test, the parsed results or where the parse failed. Quick and easy way to run a parse expression against a list of sample strings. Parameters: - tests - a list of separate test strings, or a multiline string of test strings - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests - comment - (default=C{'#'}) - expression for indicating embedded comments in the test string; pass None to disable comment filtering - fullDump - (default=C{True}) - dump results as list followed by results names in nested outline; if False, only dump nested list - printResults - (default=C{True}) prints test output to stdout - failureTests - (default=C{False}) indicates if these tests are expected to fail parsing Returns: a (success, results) tuple, where success indicates that all tests succeeded (or failed if C{failureTests} is True), and the results contain a list of lines of each test's output Example:: number_expr = pyparsing_common.number.copy() result = number_expr.runTests(''' # unsigned integer 100 # negative integer -100 # float with scientific notation 6.02e23 # integer with scientific notation 1e-12 ''') print("Success" if result[0] else "Failed!") result = number_expr.runTests(''' # stray character 100Z # missing leading digit before '.' -.100 # too many '.' 3.14.159 ''', failureTests=True) print("Success" if result[0] else "Failed!") prints:: # unsigned integer 100 [100] # negative integer -100 [-100] # float with scientific notation 6.02e23 [6.02e+23] # integer with scientific notation 1e-12 [1e-12] Success # stray character 100Z ^ FAIL: Expected end of text (at char 3), (line:1, col:4) # missing leading digit before '.' -.100 ^ FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1) # too many '.' 3.14.159 ^ FAIL: Expected end of text (at char 4), (line:1, col:5) Success Each test string must be on a single line. If you want to test a string that spans multiple lines, create a test like this:: expr.runTest(r"this is a test\n of strings that spans \n 3 lines") (Note that this is a raw string literal, you must include the leading 'r'.) TNFr]ú\nr™)r{z(FATAL)r¡ú rú^zFAIL: zFAIL-EXCEPTION: )r}ròrírçrr¿ÚrstripÚ splitlinesrrHr6r¾r”rBrxrr#rIr¨r;r±rŒ)rÚtestsr@ÚcommentÚfullDumpÚprintResultsÚfailureTestsÚ allResultsÚcommentsÚsuccessrxrSÚresultr±rìr”ryryrzÚrunTests¸sT W $€€ý zParserElement.runTests©F©Trã)r9r‰)Tr›TTF)OrœrržrÈr·r?Ústaticmethodrºr¼r¯rórÕrÚrær„rêrñròr÷rûrýrrr rràrr)r,r2rr1r3r7rär8r:r<rBÚ_MAX_INTrKr…rPr’r?rKr_r`rirjrkrmrnrorprqrrrsrtrwryrzr{rrr¸r»r=rƒr…rŒrr’r•r—r˜rHrªÚ __classcell__ryryrrzr&Osš & G "2G+D ) r&có eZdZdZ‡fdd„Z‡ZS)r.zT Abstract C{ParserElement} subclass, for defining atomic matching patterns. cstt|ƒjdddS©NF©rÑ)rŽr.r¯r·rryrzr¯@ r#zToken.__init__©rœrržrÈr¯r¯ryryrrzr.< ór.cr°)rz, An empty token, will always match. cs$tt|ƒ ¡d|_d|_d|_dS)NrTF)rŽrr¯rärÅrÊr·rryrzr¯H s zEmpty.__init__r³ryryrrzrD r´rcó*eZdZdZ‡fdd„Zddd„Z‡ZS)rz( A token that will never match. cs*tt|ƒ ¡d|_d|_d|_d|_dS)NrTFzUnmatchable token)rŽrr¯rärÅrÊrËr·rryrzr¯S s zNoMatch.__init__TcCst|||j|ƒ‚r‰)r!rËrüryryrzrýZ szNoMatch.parseImplr¬©rœrržrÈr¯rýr¯ryryrrzrO srcrµ)raÐ Token to exactly match a specified string. Example:: Literal('blah').parseString('blah') # -> ['blah'] Literal('blah').parseString('blahfooblah') # -> ['blah'] Literal('blah').parseString('bla') # -> Exception: Expected "blah" For case-insensitive matching, use L{CaselessLiteral}. For keyword matching (force word break before and after the matched string), use L{Keyword} or L{CaselessKeyword}. cs‚tt|ƒ ¡||_t|ƒ|_z|d|_Wnty*tj dt ddt|_Ynwdt |jƒ|_d|j|_d|_d|_dS)Nrz2null string passed to Literal; use Empty() insteadrsrWú"%s"rÓF)rŽrr¯ÚmatchrÚmatchLenÚfirstMatchCharrörYrZr[rr®rˆrärËrÅrÊ©rÚmatchStringrryrzr¯l s ÿ ý zLiteral.__init__TcCsF|||jkr|jdks| |j|¡r||j|jfSt|||j|ƒ‚rø)rºr¹Ú startswithr¸r!rËrüryryrzrý szLiteral.parseImplr¬r¶ryryrrzr^ s rcsLeZdZdZedZd‡fdd„ Zddd „Z‡fd d„Ze dd „ƒZ ‡ZS)ra\ Token to exactly match a specified string as a keyword, that is, it must be immediately followed by a non-keyword character. Compare with C{L{Literal}}: - C{Literal("if")} will match the leading C{'if'} in C{'ifAndOnlyIf'}. - C{Keyword("if")} will not; it will only match the leading C{'if'} in C{'if x=1'}, or C{'if(y==2)'} Accepts two optional constructor arguments in addition to the keyword string: - C{identChars} is a string of characters that would be valid identifier characters, defaulting to all alphanumerics + "_" and "$" - C{caseless} allows case-insensitive matching, default is C{False}. Example:: Keyword("start").parseString("start") # -> ['start'] Keyword("start").parseString("starting") # -> Exception For case-insensitive matching, use L{CaselessKeyword}. ú_$NFcs¬tt|ƒ ¡|durtj}||_t|ƒ|_z|d|_Wnty.t j dtddYnwd|j|_d|j|_ d|_d|_||_|rO| ¡|_| ¡}t|ƒ|_dS)Nrz2null string passed to Keyword; use Empty() insteadrsrWr·rÓF)rŽrr¯ÚDEFAULT_KEYWORD_CHARSr¸rr¹rºrörYrZr[rärËrÅrÊÚcaselessÚupperÚ caselessmatchrÚ identChars)rr¼rÃrÀrryrzr¯š s* ÿÿ zKeyword.__init__TcCs|jr>||||j… ¡|jkr=|t|ƒ|jks&|||j ¡|jvr=|dks5||d ¡|jvr=||j|jfSn;|||jkry|jdksQ| |j|¡ry|t|ƒ|jksd|||j|jvry|dksq||d|jvry||j|jfSt |||j |ƒ‚r)rÀr¹rÁrÂrrÃr¸rºr½r!rËrüryryrzrý¯ s*€&zKeyword.parseImplcstt|ƒ ¡}tj|_|Sr‰)rŽrrór¿rÃ)rr¥rryrzró½ szKeyword.copycCr¶)z,Overrides the default Keyword chars N)rr¿r¸ryryrzÚsetDefaultKeywordCharsÂ s zKeyword.setDefaultKeywordCharsr#r¬)rœrržrÈr5r¿r¯rýrórrÄr¯ryryrrzr‡ s rcrµ)r al Token to match a specified string, ignoring case of letters. Note: the matched results will always be in the case of the given match string, NOT the case of the input text. Example:: OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD'] (Contrast with example for L{CaselessKeyword}.) cs6tt|ƒ | ¡¡||_d|j|_d|j|_dS)Nz'%s'rÓ)rŽr r¯rÁÚreturnStringrärËr»rryrzr¯Ó szCaselessLiteral.__init__TcCs<||||j… ¡|jkr||j|jfSt|||j|ƒ‚r‰)r¹rÁr¸rÅr!rËrüryryrzrýÚ szCaselessLiteral.parseImplr¬r¶ryryrrzr È s r có,eZdZdZd‡fdd„ Zd dd„Z‡ZS) r zÐ Caseless version of L{Keyword}. Example:: OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD'] (Contrast with example for L{CaselessLiteral}.) Ncstt|ƒj||dddS)NT©rÀ)rŽr r¯)rr¼rÃrryrzr¯è szCaselessKeyword.__init__TcCsf||||j… ¡|jkr+|t|ƒ|jks#|||j ¡|jvr+||j|jfSt|||j|ƒ‚r‰)r¹rÁrÂrrÃr¸r!rËrüryryrzrýë s*zCaselessKeyword.parseImplr‰r¬r¶ryryrrzr ß sr crÆ) rnax A variation on L{Literal} which matches "close" matches, that is, strings with at most 'n' mismatching characters. C{CloseMatch} takes parameters: - C{match_string} - string to be matched - C{maxMismatches} - (C{default=1}) maximum number of mismatches allowed to count as a match The results from a successful parse will contain the matched text from the input string and the following named results: - C{mismatches} - a list of the positions within the match_string where mismatches were found - C{original} - the original match_string used to compare against the input string If C{mismatches} is an empty list, then the match was an exact match. Example:: patt = CloseMatch("ATCATCGAATGGA") patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']}) patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1) # exact match patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']}) # close match allowing up to 2 mismatches patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2) patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']}) rcsBtt|ƒ ¡||_||_||_d|j|jf|_d|_d|_dS)Nz&Expected %r (with up to %d mismatches)F) rŽrnr¯räÚmatch_stringÚ maxMismatchesrËrÊrÅ)rrÈrÉrryrzr¯ s zCloseMatch.__init__TcCsÆ|}t|ƒ}|t|jƒ}||kr[|j}d}g} |j} tt|||…|jƒƒD]\}}|\}} || kr@| |¡t| ƒ| kr@nq'|d}t|||…gƒ}|j|d<| |d<||fSt|||j|ƒ‚)NrrÚoriginalÚ mismatches) rrÈrÉrr“r6r$r!rË)rrr¨rÝÚstartrúÚmaxlocrÈÚmatch_stringlocrËrÉÚs_mÚsrcÚmatÚresultsryryrzrý s* € zCloseMatch.parseImpl)rr¬r¶ryryrrzrnñ s rncs8eZdZdZd ‡fdd„ Zdd d „Z‡fdd„Z‡ZS)r1a Token for matching words composed of allowed character sets. Defined with string containing all allowed initial characters, an optional string containing allowed body characters (if omitted, defaults to the initial character set), and an optional minimum, maximum, and/or exact length. The default value for C{min} is 1 (a minimum value < 1 is not valid); the default values for C{max} and C{exact} are 0, meaning no maximum or exact length restriction. An optional C{excludeChars} parameter can list characters that might be found in the input C{bodyChars} string; useful to define a word of all printables except for one or two characters, for instance. L{srange} is useful for defining custom character set strings for defining C{Word} expressions, using range notation from regular expression character sets. A common mistake is to use C{Word} to match a specific literal string, as in C{Word("Address")}. Remember that C{Word} uses the string argument to define I{sets} of matchable characters. This expression would match "Add", "AAA", "dAred", or any other word made up of the characters 'A', 'd', 'r', 'e', and 's'. To match an exact literal string, use L{Literal} or L{Keyword}. pyparsing includes helper strings for building Words: - L{alphas} - L{nums} - L{alphanums} - L{hexnums} - L{alphas8bit} (alphabetic characters in ASCII range 128-255 - accented, tilded, umlauted, etc.) - L{punc8bit} (non-alphabetic characters in ASCII range 128-255 - currency, symbols, superscripts, diacriticals, etc.) - L{printables} (any non-whitespace character) Example:: # a word composed of digits integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9")) # a word with a leading capital, and zero or more lowercase capital_word = Word(alphas.upper(), alphas.lower()) # hostnames are alphanumeric, with leading alpha, and '-' hostname = Word(alphas, alphanums+'-') # roman numeral (not a strict parser, accepts invalid mix of characters) roman = Word("IVXLCDM") # any string of non-whitespace characters, except for ',' csv_value = Word(printables, excludeChars=",") NrrFcsÊtt|ƒ ¡ˆr#d ‡fdd„|Dƒ¡}|r#d ‡fdd„|Dƒ¡}||_t|ƒ|_|r6||_t|ƒ|_n||_t|ƒ|_|dk|_ |dkrKt dƒ‚||_|dkrV||_nt |_|dkrc||_||_t|ƒ|_d|j|_d |_||_d |j|jvrÝ|dkrß|dkrá|dkrã|j|jkr—dt|jƒ|_n#t|jƒdkrdt |j¡t|jƒf|_n d t|jƒt|jƒf|_|jrÅd|jd|_z t |j¡|_WdStyÜd|_YdSwdSdSdSdS)Nr¡c3ó|] }|ˆvr|VqdSr‰ryr¤©ÚexcludeCharsryrzrŒ` r‘z Word.__init__..c3rÓr‰ryr¤rÔryrzrŒb r‘rrzZcannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permittedrÓFrz[%s]+z%s[%s]*z [%s][%s]*z\b)rŽr1r¯r¾Ú initCharsOrigrÚ initCharsÚ bodyCharsOrigÚ bodyCharsÚmaxSpecifiedrfÚminLenÚmaxLenr®rˆrärËrÊÚ asKeywordÚ_escapeRegexRangeCharsÚreStringrrÎÚescapeÚcompiler±)rr×rÙÚminÚmaxÚexactrÝrÕrrÔrzr¯] s` ( ÿÿÿÿÿñz Word.__init__Tc CsF|jr|j ||¡}|st|||j|ƒ‚| ¡}|| ¡fS|||jvr-t|||j|ƒ‚|}|d7}t|ƒ}|j}||j }t ||ƒ}||kr\|||vr\|d7}||kr\|||vsNd} |||jkrgd} |jrv||krv|||vrvd} |j r‘|dkr…||d|vs||kr‘|||vr‘d} | r›t|||j|ƒ‚||||…fS)NrFTr)rÎr¸r!rËÚendÚgroupr×rrÙrÜrârÛrÚrÝ) rrr¨rÝr©rÌrúÚ bodycharsrÍÚthrowExceptionryryrzrý“ s8 ÿ,zWord.parseImplcsxztt|ƒ ¡WStyYnw|jdur9dd„}|j|jkr1d||jƒ||jƒf|_|jSd||jƒ|_|jS)NcSs t|ƒdkr|dd…dS|S)Néú...r©rryryrzÚ charsAsStr¿ sz Word.__str__..charsAsStrz W:(%s,%s)zW:(%s))rŽr1r¸r±r¿rÖrØ)rrìrryrzr¸¶ sÿ þzWord.__str__)NrrrFNr¬©rœrržrÈr¯rýr¸r¯ryryrrzr1. s . 6#r1csFeZdZdZee d¡ƒZd‡fdd„ Zddd„Z ‡fd d „Z ‡ZS) r)a Token for matching strings that match a given regular expression. Defined with string specifying the regular expression in a form recognized by the inbuilt Python re module. If the given regex contains named groups (defined using C{(?P...)}), these will be preserved as named parse results. Example:: realnum = Regex(r"[+-]?\d+\.\d*") date = Regex(r'(?P\d{4})-(?P\d\d?)-(?P\d\d?)') # ref: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression roman = Regex(r"M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})") z[A-Z]rcsÖtt|ƒ ¡t|tƒr?|stjdtdd||_||_ zt |j|j ¡|_ |j|_Wn,t jy>tjd|tdd‚wt|tjƒrT||_ t|ƒ|_|_||_ ntdƒ‚t|ƒ|_d|j|_d|_d|_d S) zThe parameters C{pattern} and C{flags} are passed to the C{re.compile()} function as-is. See the Python C{re} module for an explanation of the acceptable patterns and flags.z0null string passed to Regex; use Empty() insteadrsrWú$invalid pattern (%s) passed to RegexzCRegex may only be constructed with a string or a compiled RE objectrÓFTN)rŽr)r¯r}ròrYrZr[ÚpatternÚflagsrÎrárßÚ sre_constantsÚerrorÚcompiledREtyperrfrˆrärËrÊrÅ)rrïrðrryrzr¯Û s8 ÿ ÿýÿ zRegex.__init__TcCs`|j ||¡}|st|||j|ƒ‚| ¡}| ¡}t| ¡ƒ}|r,|D]}||||<q#||fSr‰)rÎr¸r!rËråÚ groupdictr$ræ)rrr¨rÝr©Údr‡rÿryryrzrýý szRegex.parseImplcsDztt|ƒ ¡WStyYnw|jdurdt|jƒ|_|jS)NzRe:(%s))rŽr)r¸r±r¿rÝrïr·rryrzr¸ sÿ z Regex.__str__r÷r¬)rœrržrÈrÅrÎrárór¯rýr¸r¯ryryrrzr)Í s " r)cs8eZdZdZd‡fdd„ Zddd„Z‡fd d „Z‡ZS) r'a« Token for matching strings that are delimited by quoting characters. Defined with the following parameters: - quoteChar - string of one or more characters defining the quote delimiting string - escChar - character to escape quotes, typically backslash (default=C{None}) - escQuote - special quote sequence to escape an embedded quote string (such as SQL's "" to escape an embedded ") (default=C{None}) - multiline - boolean indicating whether quotes can span multiple lines (default=C{False}) - unquoteResults - boolean indicating whether the matched text should be unquoted (default=C{True}) - endQuoteChar - string of one or more characters defining the end of the quote delimited string (default=C{None} => same as quoteChar) - convertWhitespaceEscapes - convert escaped whitespace (C{'\t'}, C{'\n'}, etc.) to actual whitespace (default=C{True}) Example:: qs = QuotedString('"') print(qs.searchString('lsjdf "This is the quote" sldjf')) complex_qs = QuotedString('{{', endQuoteChar='}}') print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf')) sql_qs = QuotedString('"', escQuote='""') print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf')) prints:: [['This is the quote']] [['This is the "quote"']] [['This is the quote with "embedded" quotes']] NFTc s>ttˆƒ ¡| ¡}|stjdtddtƒ‚|dur|}n| ¡}|s0tjdtddtƒ‚|ˆ_t |ƒˆ_ |dˆ_|ˆ_t |ƒˆ_ |ˆ_|ˆ_|ˆ_|ˆ_|rttjtjBˆ_dt ˆj¡tˆjdƒ|durnt|ƒpodfˆ_ndˆ_dt ˆj¡tˆjdƒ|dur‹t|ƒpŒdfˆ_t ˆjƒd krµˆjd d ‡fdd „tt ˆjƒd ddƒDƒ¡d7_|rÃˆjdt |¡7_|rÚˆjdt |¡7_t ˆj¡dˆ_ˆjdt ˆj¡7_zt ˆjˆj¡ˆ_ˆjˆ_Wntjytjdˆjtdd‚wt ˆƒˆ_!dˆj!ˆ_"dˆ_#dˆ_$dS)Nz$quoteChar cannot be the empty stringrsrWz'endQuoteChar cannot be the empty stringrz%s(?:[^%s%s]r¡z%s(?:[^%s\n\r%s]rz|(?:z)|(?:c3s6|]}dt ˆjd|…¡tˆj|ƒfVqdS)z%s[^%s]N)rÎràÚendQuoteCharrÞrOr·ryrzrŒXs€þÿz(QuotedString.__init__..rtú)z|(?:%s)z|(?:%s.)z(.)z)*%srîrÓFT)%rŽr'r¯r¿rYrZr[ÚSyntaxErrorÚ quoteCharrÚquoteCharLenÚfirstQuoteCharröÚendQuoteCharLenÚescCharÚescQuoteÚunquoteResultsÚconvertWhitespaceEscapesrÎÚ MULTILINEÚDOTALLrðràrÞrïr¾rÚescCharReplacePatternrárßrñròrˆrärËrÊrÅ)rrùrýrþÚ multilinerÿrörrr·rzr¯/s| þÿ þÿþþÿÿý zQuotedString.__init__c CsÔ|||jkr|j ||¡pd}|st|||j|ƒ‚| ¡}| ¡}|jrf||j|j …}t |tƒrfd|vrP|jrPdddddœ}| ¡D] \}}| ||¡}qE|jr[t |jd|¡}|jrf| |j|j¡}||fS)Nú\ú r]úú )ú\trœz\fz\rz\g<1>)rûrÎr¸r!rËrårærÿrúrür}ròrrr”rýrrrþrö) rrr¨rÝr©r‡Úws_mapÚwslitÚwscharryryrzrýps* üzQuotedString.parseImplcsFztt|ƒ ¡WStyYnw|jdur d|j|jf|_|jS)Nz.quoted string, starting with %s ending with %s)rŽr'r¸r±r¿rùrör·rryrzr¸“sÿ zQuotedString.__str__)NNFTNTr¬ríryryrrzr's A#r'cs8eZdZdZd‡fdd„ Zddd„Z‡fd d „Z‡ZS) raô Token for matching words composed of characters I{not} in a given set (will include whitespace in matched characters if not listed in the provided exclusion set - see example). Defined with string containing all disallowed characters, and an optional minimum, maximum, and/or exact length. The default value for C{min} is 1 (a minimum value < 1 is not valid); the default values for C{max} and C{exact} are 0, meaning no maximum or exact length restriction. Example:: # define a comma-separated-value as anything that is not a ',' csv_value = CharsNotIn(',') print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213")) prints:: ['dkls', 'lsdkjf', 's12 34', '@!#', '213'] rrcs†tt|ƒ ¡d|_||_|dkrtdƒ‚||_|dkr ||_nt|_|dkr-||_||_t |ƒ|_ d|j |_|jdk|_d|_ dS)NFrzfcannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permittedrrÓ)rŽrr¯rÂÚnotCharsrfrÛrÜr®rˆrärËrÅrÊ)rr rârãrärryrzr¯¯s zCharsNotIn.__init__TcCs¢|||jvrt|||j|ƒ‚|}|d7}|j}t||jt|ƒƒ}||kr:|||vr:|d7}||kr:|||vs,|||jkrIt|||j|ƒ‚||||…fSrø)r r!rËrârÜrrÛ)rrr¨rÝrÌÚnotcharsÚmaxlenryryrzrýÇsþzCharsNotIn.parseImplcshztt|ƒ ¡WStyYnw|jdur1t|jƒdkr+d|jdd…|_|jSd|j|_|jS)Nréz !W:(%s...)z!W:(%s))rŽrr¸r±r¿rr r·rryrzr¸Øsÿ þzCharsNotIn.__str__)rrrr¬ríryryrrzrŸs rcs<eZdZdZddddddœZd‡fdd„ Zddd„Z‡ZS)r0a Special matching class for matching whitespace. Normally, whitespace is ignored by pyparsing grammars. This class is included when some whitespace structures are significant. Define with a string containing the whitespace characters to be matched; default is C{" \t\r\n"}. Also takes optional C{min}, C{max}, and C{exact} arguments, as defined for the C{L{Word}} class. zzzzz)rrr]rrú rrcs–ttˆƒ ¡|ˆ_ˆ d ‡fdd„ˆjDƒ¡¡d dd„ˆjDƒ¡ˆ_dˆ_dˆjˆ_ |ˆ_ |dkr:|ˆ_ntˆ_|dkrI|ˆ_|ˆ_ dSdS)Nr¡c3s|] }|ˆjvr|VqdSr‰)Ú matchWhiter¤r·ryrzrŒør¦z!White.__init__..css|]}tj|VqdSr‰)r0Ú whiteStrsr¤ryryrzrŒúrvTrÓr) rŽr0r¯rryr¾rÃrärÅrËrÛrÜr®)rÚwsrârãrärr·rzr¯õs þzWhite.__init__TcCs¤|||jvrt|||j|ƒ‚|}|d7}||j}t|t|ƒƒ}||kr;|||jvr;|d7}||kr;|||jvs,|||jkrJt|||j|ƒ‚||||…fSrø)rr!rËrÜrârrÛ)rrr¨rÝrÌrÍryryrzrý s ÿzWhite.parseImpl)rrrrr¬)rœrržrÈrr¯rýr¯ryryrrzr0æsûr0cóeZdZ‡fdd„Z‡ZS)Ú_PositionTokencs(tt|ƒ ¡|jj|_d|_d|_dSró)rŽrr¯r®rœrärÅrÊr·rryrzr¯ó z_PositionToken.__init__©rœrržr¯r¯ryryrrzrórcs2eZdZdZ‡fdd„Zdd„Zd dd„Z‡ZS) rzb Token to advance to a specific column of input text; useful for tabular report scraping. cstt|ƒ ¡||_dSr‰)rŽrr¯r;)rÚcolnorryrzr¯$ó zGoToColumn.__init__cCs~t||ƒ|jkr=t|ƒ}|jr| ||¡}||kr=|| ¡r=t||ƒ|jkr=|d7}||kr=|| ¡r=t||ƒ|jks'|Srø)r;rrÇr÷Úisspace)rrr¨rúryryrzrû(s$$ÿzGoToColumn.preParseTcCsDt||ƒ}||jkrt||d|ƒ‚||j|}|||…}||fS)NzText not in expected column©r;r!)rrr¨rÝÚthiscolÚnewlocr‡ryryrzrý1s zGoToColumn.parseImplr¬)rœrržrÈr¯rûrýr¯ryryrrzr s rcrµ)ra¿ Matches if current position is at the beginning of a line within the parse string Example:: test = ''' AAA this line AAA and this line AAA but not this one B AAA and definitely not this one ''' for t in (LineStart() + 'AAA' + restOfLine).searchString(test): print(t) Prints:: ['AAA', ' this line'] ['AAA', ' and this line'] cótt|ƒ ¡d|_dS)NzExpected start of line)rŽrr¯rËr·rryrzr¯OrzLineStart.__init__TcCs&t||ƒdkr|gfSt|||j|ƒ‚rø)r;r!rËrüryryrzrýSszLineStart.parseImplr¬r¶ryryrrzr:srcrµ)rzU Matches if current position is at the end of a line within the parse string cs,tt|ƒ ¡| tj dd¡¡d|_dS)Nr]r¡zExpected end of line)rŽrr¯ryr&r·r”rËr·rryrzr¯\s zLineEnd.__init__TcCs\|t|ƒkr||dkr|ddfSt|||j|ƒ‚|t|ƒkr&|dgfSt|||j|ƒ‚)Nr]r©rr!rËrüryryrzrýaszLineEnd.parseImplr¬r¶ryryrrzrXsrcrµ)r,zM Matches if current position is at the beginning of the parse string cr)NzExpected start of text)rŽr,r¯rËr·rryrzr¯przStringStart.__init__TcCs0|dkr|| |d¡krt|||j|ƒ‚|gfSrÜ)rûr!rËrüryryrzrýtszStringStart.parseImplr¬r¶ryryrrzr,lór,crµ)r+zG Matches if current position is at the end of the parse string cr)NzExpected end of text)rŽr+r¯rËr·rryrzr¯rzStringEnd.__init__TcCsX|t|ƒkrt|||j|ƒ‚|t|ƒkr|dgfS|t|ƒkr$|gfSt|||j|ƒ‚rør rüryryrzrýƒszStringEnd.parseImplr¬r¶ryryrrzr+{r!r+có.eZdZdZef‡fdd„ Zddd„Z‡ZS)r3ap Matches if the current position is at the beginning of a Word, and is not preceded by any character in a given set of C{wordChars} (default=C{printables}). To emulate the C{} behavior of regular expressions, use C{WordStart(alphanums)}. C{WordStart} will also match at the beginning of the string being parsed, or at the beginning of a line. cs"tt|ƒ ¡t|ƒ|_d|_dS)NzNot at the start of a word)rŽr3r¯rÚ wordCharsrË©rr#rryrzr¯•s zWordStart.__init__TcCs@|dkr||d|jvs|||jvrt|||j|ƒ‚|gfSr)r#r!rËrüryryrzrýšs zWordStart.parseImplr¬©rœrržrÈrXr¯rýr¯ryryrrzr3sr3cr")r2aZ Matches if the current position is at the end of a Word, and is not followed by any character in a given set of C{wordChars} (default=C{printables}). To emulate the C{} behavior of regular expressions, use C{WordEnd(alphanums)}. C{WordEnd} will also match at the end of the string being parsed, or at the end of a line. cs(tt|ƒ ¡t|ƒ|_d|_d|_dS)NFzNot at the end of a word)rŽr2r¯rr#rÂrËr$rryrzr¯©rzWordEnd.__init__TcCsPt|ƒ}|dkr$||kr$|||jvs||d|jvr$t|||j|ƒ‚|gfSr)rr#r!rË)rrr¨rÝrúryryrzrý¯szWordEnd.parseImplr¬r%ryryrrzr2¡sr2cs„eZdZdZd‡fdd„ Zdd„Zdd„Zd d „Z‡fdd„Z‡fd d„Z ‡fdd„Z d‡fdd„ Zgfdd„Z‡fdd„Z ‡ZS)r"z^ Abstract subclass of ParserElement, for combining and post-processing parsed tokens. Fcs¬tt|ƒ |¡t|tƒrt|ƒ}t|tƒrt |¡g|_ n3t|t ƒr.F)rŽr"r¯r}rïríròr&r»ÚexprsrÚallrçrõrÏ©rr&rÑrryrzr¯¼s ÿ zParseExpression.__init__cCrØr‰)r&rÙryryrzrÛÐrÑzParseExpression.__getitem__cCs|j |¡d|_|Sr‰)r&r6r¿rJryryrzr6ÓszParseExpression.appendcCs0d|_dd„|jDƒ|_|jD]}| ¡q|S)z~Extends C{leaveWhitespace} defined in base class, and also invokes C{leaveWhitespace} on all contained expressions.FcSóg|]}| ¡‘qSryr=©rŠrõryryrzrúÜrûz3ParseExpression.leaveWhitespace..)rÂr&rw)rrõryryrzrwØs zParseExpression.leaveWhitespacecstt|tƒr"||jvr tt|ƒ |¡|jD] }| |jd¡q|Stt|ƒ |¡|jD] }| |jd¡q-|Sr)r}r-rÇrŽr"r{r&)rr>rõrryrzr{áó ý zParseExpression.ignorecsLztt|ƒ ¡WStyYnw|jdur#d|jjt|jƒf|_|jS©Nz%s:(%s)) rŽr"r¸r±r¿r®rœrˆr&r·rryrzr¸ísÿ zParseExpression.__str__cs tt|ƒ ¡|jD]}| ¡q t|jƒdkr‡|jd}t||jƒrO|jsO|jdurO|j sO|jdd…|jdg|_d|_ |j|jO_|j|jO_|jd}t||jƒr‡|js‡|jdur‡|j s‡|jdd…|jdd…|_d|_ |j|jO_|j|jO_dt |ƒ|_|S)NrsrrrtrÓ)rŽr"r=r&rr}r®r½rÀrÈr¿rÅrÊrˆrË)rrõr>rryrzr=÷s8 ÿ ÿ ÿ ÿzParseExpression.streamlinecstt|ƒ ||¡}|Sr‰)rŽr"rÚ)rrärØr‡rryrzrÚ szParseExpression.setResultsNamecCs6|dd…|g}|jD]}| |¡q| g¡dSr‰)r&r…rƒ)rr„Útmprõryryrzr… ó zParseExpression.validatecs$tt|ƒ ¡}dd„|jDƒ|_|S)NcSr)ryr=r*ryryrzrú% rûz(ParseExpression.copy..)rŽr"rór&r\rryrzró# szParseExpression.copyr«)rœrržrÈr¯rÛr6rwr{r¸r=rÚr…rór¯ryryrrzr"¸s "r"csTeZdZdZGdd„deƒZd‡fdd„ Zddd„Zd d „Zdd„Z d d„Z ‡ZS)ra Requires all given C{ParseExpression}s to be found in the given order. Expressions may be separated by whitespace. May be constructed using the C{'+'} operator. May also be constructed using the C{'-'} operator, which will suppress backtracking. Example:: integer = Word(nums) name_expr = OneOrMore(Word(alphas)) expr = And([integer("id"),name_expr("name"),integer("age")]) # more easily written as: expr = integer("id") + name_expr("name") + integer("age") cr)zAnd._ErrorStopcs*ttj|ƒj|i|¤Žd|_| ¡dS)Nú-)rŽrr^r¯rärwr~rryrzr¯9 szAnd._ErrorStop.__init__rryryrrzr^8 rr^TcsRtt|ƒ ||¡tdd„|jDƒƒ|_| |jdj¡|jdj|_d|_ dS)Ncsó|]}|jVqdSr‰©rÅr*ryryrzrŒ@ ó€zAnd.__init__..rT) rŽrr¯r'r&rÅryrÃrÂrÏr(rryrzr¯> s zAnd.__init__c Csæ|jdj|||dd\}}d}|jdd…D]W}t|tjƒr"d}q|r[z| |||¡\}}Wn4ty7‚tyJ}zd|_t |¡‚d}~wt yZt|t |ƒ|j|ƒ‚w| |||¡\}}|sj| ¡rn||7}q||fS)NrFrCrT) r&rär}rr^r%rÚ __traceback__r²rörrËr,) rrr¨rÝÚ resultlistÚ errorStoprõÚ exprtokensr±ryryrzrýE s. €ÿ€z And.parseImplcCót|tƒr t |¡}| |¡Sr‰©r}ròr&r»r6rJryryrzrI^ ó zAnd.__iadd__cCs8|dd…|g}|jD] }| |¡|jsdSqdSr‰)r&rƒrÅ©rrÐÚsubRecCheckListrõryryrzrƒc s ÿþzAnd.checkRecursioncCó@t|dƒr|jS|jdurdd dd„|jDƒ¡d|_|jS)NräÚ{rcsó|]}t|ƒVqdSr‰rºr*ryryrzrŒo r zAnd.__str__..Ú}©rrär¿r¾r&r·ryryrzr¸j ó zAnd.__str__r¬)rœrržrÈrr^r¯rýrIrƒr¸r¯ryryrrzr( s rcóDeZdZdZd‡fdd„ Zddd„Zdd „Zd d„Zdd „Z‡Z S)ra¾ Requires that at least one C{ParseExpression} is found. If two expressions match, the expression that matches the longest string will be used. May be constructed using the C{'^'} operator. Example:: # construct Or using '^' operator number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums)) print(number.searchString("123 3.1416 789")) prints:: [['123'], ['3.1416'], ['789']] Fcó<tt|ƒ ||¡|jrtdd„|jDƒƒ|_dSd|_dS)Ncsr0r‰r1r*ryryrzrŒ… r2zOr.__init__..T)rŽrr¯r&ryrÅr(rryrzr¯‚ ó zOr.__init__TcCsDd}d}g}|jD]M}z| ||¡}Wn;ty2} zd| _| j|kr(| }| j}WYd} ~ q d} ~ wtyNt|ƒ|krLt|t|ƒ|j|ƒ}t|ƒ}Yq w| ||f¡q |r‘|j dd„d|D]-\} }z | |||¡WSty} zd| _| j|kr†| }| j}WYd} ~ qcd} ~ ww|dur›|j|_|‚t||d|ƒ‚)NrtcSs |dSrÜry)Úxryryrzr{ž rzOr.parseImpl..)r2ú no defined alternatives to match)r&r r!r3r¨rörrËr6Úsorträr©)rrr¨rÝÚ maxExcLocÚmaxExceptionrHrõÚloc2rÚ_ryryrzrý‰ sF €€ý €üzOr.parseImplcCr7r‰r8rJryryrzÚ__ixor__¯ r9zOr.__ixor__cCr<)Nrär=z ^ csr>r‰rºr*ryryrzrŒ¹ r zOr.__str__..r?r@r·ryryrzr¸´ rAz Or.__str__cCó,|dd…|g}|jD]}| |¡qdSr‰©r&rƒr:ryryrzrƒ½ ó ÿzOr.checkRecursionr«r¬) rœrržrÈr¯rýrLr¸rƒr¯ryryrrzrt s & rcrB)ra½ Requires that at least one C{ParseExpression} is found. If two expressions match, the first one listed is the one that will match. May be constructed using the C{'|'} operator. Example:: # construct MatchFirst using '|' operator # watch the order of expressions to match number = Word(nums) | Combine(Word(nums) + '.' + Word(nums)) print(number.searchString("123 3.1416 789")) # Fail! -> [['123'], ['3'], ['1416'], ['789']] # put more selective expression first number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums) print(number.searchString("123 3.1416 789")) # Better -> [['123'], ['3.1416'], ['789']] FcrC)Ncsr0r‰r1r*ryryrzrŒ× r2z&MatchFirst.__init__..T)rŽrr¯r&ryrÅr(rryrzr¯Ô rDzMatchFirst.__init__Tc Cs¾d}d}|jD]F}z| |||¡}|WSty1}z|j|kr'|}|j}WYd}~qd}~wtyMt|ƒ|krKt|t|ƒ|j|ƒ}t|ƒ}Yqw|durX|j|_|‚t||d|ƒ‚)NrtrF)r&rär!r¨rörrËr©) rrr¨rÝrHrIrõr‡rryryrzrýÛ s* €€ýzMatchFirst.parseImplcCr7r‰r8rJryryrzÚ__ior__ó r9zMatchFirst.__ior__cCr<)Nrär=ú | csr>r‰rºr*ryryrzrŒý r z%MatchFirst.__str__..r?r@r·ryryrzr¸ø rAzMatchFirst.__str__cCrMr‰rNr:ryryrzrƒrOzMatchFirst.checkRecursionr«r¬) rœrržrÈr¯rýrPr¸rƒr¯ryryrrzrÃ s rcs<eZdZdZd‡fdd„ Zddd„Zdd„Zd d „Z‡ZS)ram Requires all given C{ParseExpression}s to be found, but in any order. Expressions may be separated by whitespace. May be constructed using the C{'&'} operator. Example:: color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN") shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON") integer = Word(nums) shape_attr = "shape:" + shape_type("shape") posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn") color_attr = "color:" + color("color") size_attr = "size:" + integer("size") # use Each (using operator '&') to accept attributes in any order # (shape and posn are required, color and size are optional) shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr) shape_spec.runTests(''' shape: SQUARE color: BLACK posn: 100, 120 shape: CIRCLE size: 50 color: BLUE posn: 50,80 color:GREEN size:20 shape:TRIANGLE posn:20,40 ''' ) prints:: shape: SQUARE color: BLACK posn: 100, 120 ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']] - color: BLACK - posn: ['100', ',', '120'] - x: 100 - y: 120 - shape: SQUARE shape: CIRCLE size: 50 color: BLUE posn: 50,80 ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']] - color: BLUE - posn: ['50', ',', '80'] - x: 50 - y: 80 - shape: CIRCLE - size: 50 color: GREEN size: 20 shape: TRIANGLE posn: 20,40 ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']] - color: GREEN - posn: ['20', ',', '40'] - x: 20 - y: 40 - shape: TRIANGLE - size: 20 Tcs8tt|ƒ ||¡tdd„|jDƒƒ|_d|_d|_dS)Ncsr0r‰r1r*ryryrzrŒ?r2z Each.__init__..T)rŽrr¯r'r&rÅrÂÚinitExprGroupsr(rryrzr¯=s z Each.__init__c sä|jrItdd„|jDƒƒ|_dd„|jDƒ}dd„|jDƒ}|||_dd„|jDƒ|_dd„|jDƒ|_dd„|jDƒ|_|j|j7_d |_|}|jdd…}|jdd…‰g}d } | r²|ˆ|j|j} g}| D]8}z| ||¡}Wnt y…| |¡Yqmw| |j t|ƒ|¡¡||vrœ| |¡qm|ˆvr¥ˆ |¡qmt|ƒt| ƒkr°d } | s_|rÆd dd„|Dƒ¡} t ||d | ƒ‚|‡fdd„|jDƒ7}g}|D]}| |||¡\}}| |¡qÖt|tgƒƒ}||fS)Ncss(|]}t|tƒrt|jƒ|fVqdSr‰)r}rr”rŽr*ryryrzrŒEs€&z!Each.parseImpl..cSóg|] }t|tƒr|j‘qSry©r}rrŽr*ryryrzrúFóz"Each.parseImpl..cSs g|]}|jrt|tƒs|‘qSry)rÅr}rr*ryryrzrúGó cSrSry)r}r4rŽr*ryryrzrúIrUcSrSry)r}rrŽr*ryryrzrúJrUcSs g|]}t|tttfƒs|‘qSry)r}rr4rr*ryryrzrúKrVFTrNcsr>r‰rºr*ryryrzrŒfr z*Missing one or more required elements (%s)cs$g|]}t|tƒr|jˆvr|‘qSryrTr*©ÚtmpOptryrzrújr|)rRrðr&Úopt1mapÚ optionalsÚmultioptionalsÚ multirequiredÚrequiredr r!r6rýr”Úremoverr¾räÚsumr$)rrr¨rÝÚopt1Úopt2ÚtmpLocÚtmpReqdÚ matchOrderÚkeepMatchingÚtmpExprsÚfailedrõÚmissingr4rÒÚfinalResultsryrWrzrýCsV ÿ €ñzEach.parseImplcCr<)Nrär=z & csr>r‰rºr*ryryrzrŒyr zEach.__str__..r?r@r·ryryrzr¸trAzEach.__str__cCrMr‰rNr:ryryrzrƒ}rOzEach.checkRecursionr¬) rœrržrÈr¯rýr¸rƒr¯ryryrrzrs5 1 rcsleZdZdZd‡fdd„ Zddd„Zdd „Z‡fd d„Z‡fdd „Zdd„Z gfdd„Z ‡fdd„Z‡ZS)r za Abstract subclass of C{ParserElement}, for combining and post-processing parsed tokens. Fcsžtt|ƒ |¡t|tƒr ttjtƒrt |¡}nt t |ƒ¡}||_ d|_|durM|j|_|j |_ | |j¡|j|_|j|_|j|_|j |j¡dSdSr‰)rŽr r¯r}ròÚ issubclassr&r»r.rrŽr¿rÊrÅryrÃrÂrÁrÏrÇr9©rrŽrÑrryrzr¯‡s ùzParseElementEnhance.__init__TcCs.|jdur|jj|||ddStd||j|ƒ‚)NFrCr¡)rŽrär!rËrüryryrzrý™s zParseElementEnhance.parseImplcCs*d|_|j ¡|_|jdur|j ¡|Sr#)rÂrŽrórwr·ryryrzrwŸs z#ParseElementEnhance.leaveWhitespacecstt|tƒr"||jvr tt|ƒ |¡|jdur |j |jd¡|Stt|ƒ |¡|jdur8|j |jd¡|Sr)r}r-rÇrŽr r{rŽrJrryrzr{¦r+zParseElementEnhance.ignorecs&tt|ƒ ¡|jdur|j ¡|Sr‰)rŽr r=rŽr·rryrzr=²s zParseElementEnhance.streamlinecCsF||vrt||gƒ‚|dd…|g}|jdur!|j |¡dSdSr‰)r(rŽrƒ)rrÐr;ryryrzrƒ¸s ÿz"ParseElementEnhance.checkRecursioncCs6|dd…|g}|jdur|j |¡| g¡dSr‰©rŽr…rƒ©rr„r-ryryrzr…¿r.zParseElementEnhance.validatecsVztt|ƒ ¡WStyYnw|jdur(|jdur(d|jjt|jƒf|_|jSr,) rŽr r¸r±r¿rŽr®rœrˆr·rryrzr¸ÅsÿzParseElementEnhance.__str__r«r¬) rœrržrÈr¯rýrwr{r=rƒr…r¸r¯ryryrrzr ƒs r crµ)raõ Lookahead matching of the given parse expression. C{FollowedBy} does I{not} advance the parsing position within the input string, it only verifies that the specified parse expression matches at the current position. C{FollowedBy} always returns a null token list. Example:: # use FollowedBy to match a label only if it is followed by a ':' data_word = Word(alphas) label = data_word + FollowedBy(':') attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint() prints:: [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']] cótt|ƒ |¡d|_dSrß)rŽrr¯rÅ©rrŽrryrzr¯áó zFollowedBy.__init__TcCs|j ||¡|gfSr‰)rŽr rüryryrzrýåszFollowedBy.parseImplr¬r¶ryryrrzrÐsrcs2eZdZdZ‡fdd„Zd dd„Zdd„Z‡ZS) ra± Lookahead to disallow matching with the given parse expression. C{NotAny} does I{not} advance the parsing position within the input string, it only verifies that the specified parse expression does I{not} match at the current position. Also, C{NotAny} does I{not} skip over leading whitespace. C{NotAny} always returns a null token list. May be constructed using the '~' operator. Example:: cs0tt|ƒ |¡d|_d|_dt|jƒ|_dS)NFTzFound unwanted token, )rŽrr¯rÂrÅrˆrŽrËrorryrzr¯õszNotAny.__init__TcCs&|j ||¡rt|||j|ƒ‚|gfSr‰)rŽrr!rËrüryryrzrýüszNotAny.parseImplcCó4t|dƒr|jS|jdurdt|jƒd|_|jS)Nräz~{r?©rrär¿rˆrŽr·ryryrzr¸ó zNotAny.__str__r¬ríryryrrzrês rcs(eZdZd‡fdd„ Zddd„Z‡ZS) Ú_MultipleMatchNcsLtt|ƒ |¡d|_|}t|tƒrt |¡}|dur!||_dSd|_dSrß) rŽrtr¯rÁr}ròr&r»Ú not_ender)rrŽÚstopOnÚenderrryrzr¯s z_MultipleMatch.__init__Tc Cs¸|jj}|j}|jdu}|r|jj}|r|||ƒ||||dd\}}z*|j} |r1|||ƒ| r9|||ƒ} n|} ||| |ƒ\}}|sI| ¡rM||7}q*ttfy[Y||fSw©NFrC) rŽrär÷rur rÇr,r!rö)rrr¨rÝÚself_expr_parseÚself_skip_ignorablesÚcheck_enderÚ try_not_enderrÚhasIgnoreExprsrÚ tmptokensryryrzrýs0 ÷ ýz_MultipleMatch.parseImplr‰r¬)rœrržr¯rýr¯ryryrrzrt srtc@seZdZdZdd„ZdS)raƒ Repetition of one or more of the given expression. Parameters: - expr - expression that must match one or more times - stopOn - (default=C{None}) - expression for a terminating sentinel (only required if the sentinel would ordinarily match the repetition expression) Example:: data_word = Word(alphas) label = data_word + FollowedBy(':') attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join)) text = "shape: SQUARE posn: upper left color: BLACK" OneOrMore(attr_expr).parseString(text).pprint() # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']] # use stopOn attribute for OneOrMore to avoid reading label string as part of the data attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']] # could also be written as (attr_expr * (1,)).parseString(text).pprint() cCrq)Nrär=z}...rrr·ryryrzr¸JrszOneOrMore.__str__N)rœrržrÈr¸ryryryrzr0srcs8eZdZdZd ‡fdd„ Zd‡fdd„ Zdd „Z‡ZS)r4aw Optional repetition of zero or more of the given expression. Parameters: - expr - expression that must match zero or more times - stopOn - (default=C{None}) - expression for a terminating sentinel (only required if the sentinel would ordinarily match the repetition expression) Example: similar to L{OneOrMore} Ncstt|ƒj||dd|_dS)N)rvT)rŽr4r¯rÅ)rrŽrvrryrzr¯_s zZeroOrMore.__init__Tc s6ztt|ƒ |||¡WSttfy|gfYSwr‰)rŽr4rýr!rörürryrzrýcs ÿzZeroOrMore.parseImplcCrq)NrärMú]...rrr·ryryrzr¸irszZeroOrMore.__str__r‰r¬ríryryrrzr4Ss r4c@s eZdZdd„ZeZdd„ZdS)Ú _NullTokencCr–r#ryr·ryryrzrsrz_NullToken.__bool__cCr–r§ryr·ryryrzr¸vrz_NullToken.__str__N)rœrržrr…r¸ryryryrzr€rsr€cs6eZdZdZef‡fdd„ Zd dd„Zdd„Z‡ZS) raa Optional matching of the given expression. Parameters: - expr - expression that must match zero or more times - default (optional) - value to be returned if the optional expression is not found. Example:: # US postal code can be a 5-digit zip, plus optional 4-digit qualifier zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4))) zip.runTests(''' # traditional ZIP code 12345 # ZIP+4 form 12101-0001 # invalid ZIP 98765- ''') prints:: # traditional ZIP code 12345 ['12345'] # ZIP+4 form 12101-0001 ['12101-0001'] # invalid ZIP 98765- ^ FAIL: Expected end of text (at char 5), (line:1, col:6) cs.tt|ƒj|dd|jj|_||_d|_dS)NFr²T)rŽrr¯rŽrÁr3rÅ)rrŽr-rryrzr¯s zOptional.__init__Tc Csz|jj|||dd\}}W||fSttfyG|jtur6|jjr1t|jgƒ}|j||jj<n|jg}ng}Y||fSY||fSY||fSwrx)rŽrär!rör3Ú_optionalNotMatchedrÀr$)rrr¨rÝrryryrzrý£s ÷ ýû÷zOptional.parseImplcCrq)NrärMrPrrr·ryryrzr¸±rszOptional.__str__r¬) rœrržrÈrr¯rýr¸r¯ryryrrzrzs " rcs,eZdZdZd ‡fdd„ Zd dd„Z‡ZS)r*aÿ Token for skipping over all undefined text until the matched expression is found. Parameters: - expr - target expression marking the end of the data to be skipped - include - (default=C{False}) if True, the target expression is also parsed (the skipped text and target expression are returned as a 2-element list). - ignore - (default=C{None}) used to define grammars (typically quoted strings and comments) that might contain false matches to the target expression - failOn - (default=C{None}) define expressions that are not allowed to be included in the skipped test; if found before the target expression is found, the SkipTo is not a match Example:: report = ''' Outstanding Issues Report - 1 Jan 2000 # | Severity | Description | Days Open -----+----------+-------------------------------------------+----------- 101 | Critical | Intermittent system crash | 6 94 | Cosmetic | Spelling error on Login ('log|n') | 14 79 | Minor | System slow when running too many reports | 47 ''' integer = Word(nums) SEP = Suppress('|') # use SkipTo to simply match everything up until the next SEP # - ignore quoted strings, so that a '|' character inside a quoted string does not match # - parse action will call token.strip() for each matched token, i.e., the description body string_data = SkipTo(SEP, ignore=quotedString) string_data.setParseAction(tokenMap(str.strip)) ticket_expr = (integer("issue_num") + SEP + string_data("sev") + SEP + string_data("desc") + SEP + integer("days_open")) for tkt in ticket_expr.searchString(report): print tkt.dump() prints:: ['101', 'Critical', 'Intermittent system crash', '6'] - days_open: 6 - desc: Intermittent system crash - issue_num: 101 - sev: Critical ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14'] - days_open: 14 - desc: Spelling error on Login ('log|n') - issue_num: 94 - sev: Cosmetic ['79', 'Minor', 'System slow when running too many reports', '47'] - days_open: 47 - desc: System slow when running too many reports - issue_num: 79 - sev: Minor FNcs`tt|ƒ |¡||_d|_d|_||_d|_t|t ƒr#t |¡|_n||_dt |jƒ|_dS)NTFzNo match found for )rŽr*r¯Ú ignoreExprrÅrÊÚincludeMatchrår}ròr&r»ÚfailOnrˆrŽrË)rr>Úincluder{r„rryrzr¯ñs zSkipTo.__init__Tc Cs$|}t|ƒ}|j}|jj}|jdur|jjnd}|jdur!|jjnd} |} | |kri|dur3||| ƒr3n>| durJ z| || ƒ} Wn tyHYnwq8z ||| dddWntt fyc| d7} Ynwn| |ks)t|||j |ƒ‚| }|||…}t|ƒ}|jrŽ||||dd\}} || 7}||fS)NrF)rÝrÞrC) rrŽrär„rr‚r rr!rörËr$rƒ)rrr¨rÝrrúrŽÚ expr_parseÚself_failOn_canParseNextÚself_ignoreExpr_tryParseÚtmplocÚskiptextÚ skipresultrÑryryrzrýþsD ÿýþëzSkipTo.parseImpl)FNNr¬r¶ryryrrzr*ºs6 r*csbeZdZdZd‡fdd„ Zdd„Zdd„Zd d „Zdd„Zgfd d„Z dd„Z ‡fdd„Z‡ZS)raK Forward declaration of an expression to be defined later - used for recursive grammars, such as algebraic infix notation. When the expression is known, it is assigned to the C{Forward} variable using the '<<' operator. Note: take care when assigning to C{Forward} not to overlook precedence of operators. Specifically, '|' has a lower precedence than '<<', so that:: fwdExpr << a | b | c will actually be evaluated as:: (fwdExpr << a) | b | c thereby leaving b and c out as parseable alternatives. It is recommended that you explicitly group the values inserted into the C{Forward}:: fwdExpr << (a | b | c) Converting to use the '<<=' operator instead will avoid this problem. See L{ParseResults.pprint} for an example of a recursive parser created using C{Forward}. Ncstt|ƒj|dddSr±)rŽrr¯rJrryrzr¯@rLzForward.__init__cCsjt|tƒr t |¡}||_d|_|jj|_|jj|_| |jj ¡|jj |_ |jj|_|j |jj¡|Sr‰)r}ròr&r»rŽr¿rÊrÅryrÃrÂrÁrÇr9rJryryrzÚ __lshift__Cs zForward.__lshift__cCs||>Sr‰ryrJryryrzÚ__ilshift__Pr¼zForward.__ilshift__cCrur#rvr·ryryrzrwSszForward.leaveWhitespacecCs$|jsd|_|jdur|j ¡|Srß)rÉrŽr=r·ryryrzr=Ws zForward.streamlinecCs>||vr|dd…|g}|jdur|j |¡| g¡dSr‰rlrmryryrzr…^s zForward.validatecCst|dƒr|jS|jjdS)Nräz: ...)rrär®rœZ_revertClassÚ_ForwardNoRecurserŽrˆ)rÚ retStringryryrzr¸es zForward.__str__cs*|jdurtt|ƒ ¡Stƒ}||K}|Sr‰)rŽrŽrrór\rryrzróvs zForward.copyr‰) rœrržrÈr¯rŒrrwr=r…r¸rór¯ryryrrzr-s rc@r)rŽcCr–)Nrêryr·ryryrzr¸rz_ForwardNoRecurse.__str__N)rœrržr¸ryryryrzrŽ~r rŽcs"eZdZdZd‡fdd„ Z‡ZS)r/zQ Abstract subclass of C{ParseExpression}, for converting parsed results. Fcrnr#)rŽr/r¯rÁrkrryrzr¯†rpzTokenConverter.__init__r«r³ryryrrzr/‚sr/cs6eZdZdZd ‡fdd„ Z‡fdd„Zdd „Z‡ZS)raÔ Converter to concatenate all matching tokens to a single string. By default, the matching patterns must also be contiguous in the input string; this can be disabled by specifying C{'adjacent=False'} in the constructor. Example:: real = Word(nums) + '.' + Word(nums) print(real.parseString('3.1416')) # -> ['3', '.', '1416'] # will also erroneously match the following print(real.parseString('3. 1416')) # -> ['3', '.', '1416'] real = Combine(Word(nums) + '.' + Word(nums)) print(real.parseString('3.1416')) # -> ['3.1416'] # no match when there are internal spaces print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...) r¡Tcs8tt|ƒ |¡|r| ¡||_d|_||_d|_dSrß)rŽrr¯rwÚadjacentrÂÚ joinStringrÏ)rrŽr‘rrryrzr¯›s zCombine.__init__cs*|jrt ||¡|Stt|ƒ |¡|Sr‰)rr&r{rŽrrJrryrzr{¥s ÿzCombine.ignorecCsL| ¡}|dd…=|td | |j¡¡g|jd7}|jr$| ¡r$|gS|S)Nr¡)ræ)rór$r¾rQr‘rÌrÀr,)rrr¨rÿÚretToksryryrzr¬s "zCombine.postParse)r¡T)rœrržrÈr¯r{rr¯ryryrrzrŠs rcó(eZdZdZ‡fdd„Zdd„Z‡ZS)raù Converter to return the matched tokens as a list - useful for returning tokens of C{L{ZeroOrMore}} and C{L{OneOrMore}} expressions. Example:: ident = Word(alphas) num = Word(nums) term = ident | num func = ident + Optional(delimitedList(term)) print(func.parseString("fn a,b,100")) # -> ['fn', 'a', 'b', '100'] func = ident + Group(Optional(delimitedList(term))) print(func.parseString("fn a,b,100")) # -> ['fn', ['a', 'b', '100']] crnrß)rŽrr¯rÁrorryrzr¯ÄrpzGroup.__init__cCs|gSr‰ryrþryryrzrÈr‚zGroup.postParse©rœrržrÈr¯rr¯ryryrrzr¶s rcr“)r aW Converter to return a repetitive expression as a list, but also as a dictionary. Each element can also be referenced using the first token in the expression as its key. Useful for tabular report scraping when the first column can be used as a item key. Example:: data_word = Word(alphas) label = data_word + FollowedBy(':') attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join)) text = "shape: SQUARE posn: upper left color: light blue texture: burlap" attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) # print attributes as plain groups print(OneOrMore(attr_expr).parseString(text).dump()) # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names result = Dict(OneOrMore(Group(attr_expr))).parseString(text) print(result.dump()) # access named fields as dict entries, or output as dict print(result['shape']) print(result.asDict()) prints:: ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap'] [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] - color: light blue - posn: upper left - shape: SQUARE - texture: burlap SQUARE {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'} See more examples at L{ParseResults} of accessing fields by results name. crnrß)rŽr r¯rÁrorryrzr¯ïrpz Dict.__init__cCsêt|ƒD]h\}}t|ƒdkrq|d}t|tƒr t|dƒ ¡}t|ƒdkr.td|ƒ||<qt|ƒdkrEt|dtƒsEt|d|ƒ||<q| ¡}|d=t|ƒdks[t|tƒrc| ¡rct||ƒ||<qt|d|ƒ||<q|j rs|gS|S)Nrrr¡rs)rrr}rvrˆr¿rÒr$rór,rÀ)rrr¨rÿrÚÚtokÚikeyÚ dictvalueryryrzrós$ zDict.postParser”ryryrrzr Ës#r c@rÌ)r-aV Converter for ignoring the results of a parsed expression. Example:: source = "a, b, c,d" wd = Word(alphas) wd_list1 = wd + ZeroOrMore(',' + wd) print(wd_list1.parseString(source)) # often, delimiters that are useful during parsing are just in the # way afterward - use Suppress to keep them out of the parsed output wd_list2 = wd + ZeroOrMore(Suppress(',') + wd) print(wd_list2.parseString(source)) prints:: ['a', ',', 'b', ',', 'c', ',', 'd'] ['a', 'b', 'c', 'd'] (See also L{delimitedList}.) cCsgSr‰ryrþryryrzrrzSuppress.postParsecCs|Sr‰ryr·ryryrzrt"rzSuppress.suppressN)rœrržrÈrrtryryryrzr-sr-c@s(eZdZdZdd„Zdd„Zdd„ZdS) rzI Wrapper for parse actions, to ensure they are only called once. cCst|ƒ|_d|_dSr#)rµÚcallableÚcalled)rÚ methodCallryryrzr¯*s zOnlyOnce.__init__cCs*|js| |||¡}d|_|St||dƒ‚)NTr¡)r™r˜r!)rrr˜rxrÒryryrzrs-s zOnlyOnce.__call__cCs d|_dSr#)r™r·ryryrzÚreset3rÑzOnlyOnce.resetN)rœrržrÈr¯rsr›ryryryrzr&s rcs8tˆƒ‰‡fdd„}zˆj|_W|StyY|Sw)at Decorator for debugging parse actions. When the parse action is called, this decorator will print C{">> entering I{method-name}(line:I{current_source_line}, I{parse_location}, I{matched_tokens})".} When the parse action completes, the decorator will print C{"<<"} followed by the returned value, or any exception that the parse action raised. Example:: wd = Word(alphas) @traceParseAction def remove_duplicate_chars(tokens): return ''.join(sorted(set(''.join(tokens)))) wds = OneOrMore(wd).setParseAction(remove_duplicate_chars) print(wds.parseString("slkdjs sld sldd sdlf sdljf")) prints:: >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {})) <>entering %s(line: '%s', %d, %r) z<.z)rµrœr´)r‹r¢ryr¡rzrd6s þþrdú,FcCs\t|ƒdt|ƒdt|ƒd}|r!t|t||ƒƒ |¡S|tt|ƒ|ƒ |¡S)aÇ Helper to define a delimited list of expressions - the delimiter defaults to ','. By default, the list elements and delimiters can have intervening whitespace, and comments, but this can be overridden by passing C{combine=True} in the constructor. If C{combine} is set to C{True}, the matching tokens are returned as a single token string, with the delimiters included; otherwise, the matching tokens are returned as a list of tokens, with the delimiters suppressed. Example:: delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc'] delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE'] z [rr)rˆrr4rÕr-)rŽÚdelimÚcombineÚdlNameryryrzrBbs$ rBcsjtƒ‰‡‡fdd„}|durttƒ dd„¡}n| ¡}| d¡|j|dd|ˆ d tˆƒd ¡S)a: Helper to define a counted list of expressions. This helper defines a pattern of the form:: integer expr expr expr... where the leading integer tells how many expr expressions follow. The matched tokens returns the array of expr tokens as a list - the leading count token is suppressed. If C{intExpr} is specified, it should be a pyparsing expression that produces an integer value. Example:: countedArray(Word(alphas)).parseString('2 ab cd ef') # -> ['ab', 'cd'] # in this parser, the leading integer value is given in binary, # '10' indicating that 2 values are in the array binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2)) countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef') # -> ['ab', 'cd'] cs.|d}ˆ|rttˆg|ƒƒpttƒ>gSrÜ)rrrE)rr˜rxrb©Ú arrayExprrŽryrzÚcountFieldParseActionˆs"z+countedArray..countFieldParseActionNcSst|dƒSrÜ)rvrwryryrzr{ózcountedArray..ÚarrayLenT©rÐz(len) rê)rr1rTr„rórÕrêrˆ)rŽÚintExprr©ryr§rzr>us r>cCs6g}|D]}t|tƒr| t|ƒ¡q| |¡q|Sr‰)r}rír9rMr6)ÚLr‡rÚryryrzrM”s rMcs6tƒ‰‡fdd„}|j|ddˆ dt|ƒ¡ˆS)a* Helper to define an expression that is indirectly defined from the tokens matched in a previous expression, that is, it looks for a 'repeat' of a previous expression. For example:: first = Word(nums) second = matchPreviousLiteral(first) matchExpr = first + ":" + second will match C{"1:1"}, but not C{"1:2"}. Because this matches a previous literal, will also match the leading C{"1:1"} in C{"1:10"}. If this is not desired, use C{matchPreviousExpr}. Do I{not} use with packrat parsing enabled. csT|r#t|ƒdkrˆ|d>dSt| ¡ƒ}ˆtdd„|Dƒƒ>dSˆtƒ>dS)Nrrcsr>r‰)r©rŠÚttryryrzrŒ²r zDmatchPreviousLiteral..copyTokenToRepeater..)rrMrårr)rr˜rxÚtflat©ÚrepryrzÚcopyTokenToRepeater«sz1matchPreviousLiteral..copyTokenToRepeaterTr¬ú(prev) )rrêrÕrˆ)rŽr´ryr²rzrQs rQcsFtƒ‰| ¡}ˆ|K‰‡fdd„}|j|ddˆ dt|ƒ¡ˆS)aS Helper to define an expression that is indirectly defined from the tokens matched in a previous expression, that is, it looks for a 'repeat' of a previous expression. For example:: first = Word(nums) second = matchPreviousExpr(first) matchExpr = first + ":" + second will match C{"1:1"}, but not C{"1:2"}. Because this matches by expressions, will I{not} match the leading C{"1:1"} in C{"1:10"}; the expressions are evaluated first, and then compared, so C{"1"} is compared with C{"10"}. Do I{not} use with packrat parsing enabled. cs*t| ¡ƒ‰‡fdd„}ˆj|dddS)Ncs$t| ¡ƒ}|ˆkrtdddƒ‚dS)Nr¡r)rMrår!)rr˜rxÚtheseTokens©ÚmatchTokensryrzÚmustMatchTheseTokensÌsÿzLmatchPreviousExpr..copyTokenToRepeater..mustMatchTheseTokensTr¬)rMrår„)rr˜rxr¹r²r·rzr´Êsz.matchPreviousExpr..copyTokenToRepeaterTr¬rµ)rrórêrÕrˆ)rŽÚe2r´ryr²rzrP¹srPcCs:dD] }| |t|¡}q| dd¡}| dd¡}t|ƒS)Nz\^-]r]rœrr )r”Ú_bslashrˆ)rr¥ryryrzrÞÕs rÞTc sÂ|r dd„}dd„}t‰n dd„}dd„}t‰g}t|tƒr#| ¡}nt|tƒr-t|ƒ}ntjdt dd|s:t ƒSd }|t|ƒd kr‡||}t||d d…ƒD](\}} || |ƒrd|||d =n||| ƒrz|||d =| || ¡| }nqR|d 7}|t|ƒd ksD|sÐ|rÐz3t|ƒtd |¡ƒkr¬td d dd„|Dƒ¡ƒ d |¡¡WStd dd„|Dƒ¡ƒ d |¡¡WStyÏtjdt ddYnwt‡fdd„|Dƒƒ d |¡¡S)aÛ Helper to quickly define a set of alternative Literals, and makes sure to do longest-first testing when there is a conflict, regardless of the input order, but returns a C{L{MatchFirst}} for best performance. Parameters: - strs - a string of space-delimited literals, or a collection of string literals - caseless - (default=C{False}) - treat all literals as caseless - useRegex - (default=C{True}) - as an optimization, will generate a Regex object; otherwise, will generate a C{MatchFirst} object (if C{caseless=True}, or if creating a C{Regex} raises an exception) Example:: comp_oper = oneOf("< = > <= >= !=") var = Word(alphas) number = Word(nums) term = var | number comparison_expr = term + comp_oper + term print(comparison_expr.searchString("B = 12 AA=23 B<=AA AA>12")) prints:: [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']] cSs| ¡| ¡kSr‰)rÁ©r@Úbryryrzr{õózoneOf..cSs| ¡ | ¡¡Sr‰)rÁr½r¼ryryrzr{öscSr–r‰ryr¼ryryrzr{ùršcSs | |¡Sr‰)r½r¼ryryrzr{úrz6Invalid argument to oneOf, expected string or iterablersrWrrNr¡z[%s]csr>r‰)rÞ©rŠÚsymryryrzrŒr zoneOf..rQú|css|]}t |¡VqdSr‰)rÎràr¿ryryrzrŒrvz7Exception creating Regex for oneOf, building MatchFirstc3ó|]}ˆ|ƒVqdSr‰ryr¿©ÚparseElementClassryrzrŒ$r )r rr}ròr’rrírYrZr[rrrr4r¾r)rÕr±r) ÚstrsrÀÚuseRegexÚisequalÚmasksÚsymbolsrÚÚcurrr>ryrÃrzrUÝsV ÿ üô*& ÿÿ"rUcCsttt||ƒƒƒS)aÜ Helper to easily and clearly define a dictionary by specifying the respective patterns for the key and value. Takes care of defining the C{L{Dict}}, C{L{ZeroOrMore}}, and C{L{Group}} tokens in the proper order. The key pattern can include delimiting markers or punctuation, as long as they are suppressed, thereby leaving the significant key text. The value pattern can include named results, so that the C{Dict} results can include named token fields. Example:: text = "shape: SQUARE posn: upper left color: light blue texture: burlap" attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)) print(OneOrMore(attr_expr).parseString(text).dump()) attr_label = label attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join) # similar to Dict, but simpler call format result = dictOf(attr_label, attr_value).parseString(text) print(result.dump()) print(result['shape']) print(result.shape) # object attribute access works too print(result.asDict()) prints:: [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']] - color: light blue - posn: upper left - shape: SQUARE - texture: burlap SQUARE SQUARE {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'} )r r4r)r2r ryryrzrC&s!rCcCs^tƒ dd„¡}| ¡}d|_|dƒ||dƒ}|r dd„}ndd„}| |¡|j|_|S) a Helper to return the original, untokenized text for a given expression. Useful to restore the parsed fields of an HTML start tag into the raw tag text itself, or to revert separate tokens with intervening whitespace back to the original matching input text. By default, returns astring containing the original parsed text. If the optional C{asString} argument is passed as C{False}, then the return value is a C{L{ParseResults}} containing any results names that were originally matched, and a single token containing the original matched text from the input string. So if the expression passed to C{L{originalTextFor}} contains expressions with defined results names, you must set C{asString} to C{False} if you want to preserve those results name values. Example:: src = "this is test bold text normal text " for tag in ("b","i"): opener,closer = makeHTMLTags(tag) patt = originalTextFor(opener + SkipTo(closer) + closer) print(patt.searchString(src)[0]) prints:: [' bold text '] ['text'] cSó|Sr‰ry)rr¨rxryryrzr{aóz!originalTextFor..FÚ_original_startÚ _original_endcSs||j|j…Sr‰)rÍrÎr—ryryrzr{fr¾cSs&|| d¡| d¡…g|dd…<dS)NrÍrÎ)r1r—ryryrzÚextractTexths&z$originalTextFor..extractText)rr„rórÏrÇ)rŽÚasStringÚ locMarkerÚendlocMarkerÚ matchExprrÏryryrzriIs ricCst|ƒ dd„¡S)zp Helper to undo pyparsing's default grouping of And expressions, even if all but one are non-empty. cSs|dSrÜryrwryryrzr{sršzungroup..)r/r„)rŽryryrzrjnsrjcCs4tƒ dd„¡}t|dƒ|dƒ| ¡ ¡dƒƒS)a© Helper to decorate a returned token with its starting and ending locations in the input string. This helper adds the following results names: - locn_start = location where matched expression begins - locn_end = location where matched expression ends - value = the actual parsed results Be careful if the input text contains C{} characters, you may want to call C{L{ParserElement.parseWithTabs}} Example:: wd = Word(alphas) for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"): print(match) prints:: [[0, 'ljsdf', 5]] [[8, 'lksdjjf', 15]] [[18, 'lkkjj', 23]] cSrËr‰ryr—ryryrzr{‰rÌzlocatedExpr..Ú locn_startr Úlocn_end)rr„rrórw)rŽÚlocatorryryrzrlus$rlrErKrJrcrbz\[]-*.$+^?()~ ©räcCs|ddSrryr—ryryrzr{”rªr{z\\0?[xX][0-9a-fA-F]+cCstt|d d¡dƒƒS)Nrz\0xé)ÚunichrrvÚlstripr—ryryrzr{•óz \\0[0-7]+cCstt|ddd…dƒƒS)Nrré)rÙrvr—ryryrzr{–sz\]r/rMržÚnegateÚbodyrPcs@dd„‰zd ‡fdd„t |¡jDƒ¡WStyYdSw)aÜ Helper to easily define string ranges for use in Word construction. Borrows syntax from regexp '[]' string range definitions:: srange("[0-9]") -> "0123456789" srange("[a-z]") -> "abcdefghijklmnopqrstuvwxyz" srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_" The input string must be enclosed in []'s, and the returned string is the expanded character set joined into a single string. The values enclosed in the []'s may be: - a single character - an escaped character with a leading backslash (such as C{\-} or C{\]}) - an escaped hex character with a leading C{'\x'} (C{\x21}, which is a C{'!'} character) (C{\0x##} is also supported for backwards compatibility) - an escaped octal character with a leading C{'\0'} (C{\041}, which is a C{'!'} character) - a range of any of the above, separated by a dash (C{'a-z'}, etc.) - any combination of the above (C{'aeiouy'}, C{'a-zA-Z0-9_$'}, etc.) cSs<t|tƒs|Sd dd„tt|dƒt|dƒdƒDƒ¡S)Nr¡csr>r‰)rÙr¤ryryrzrŒr z+srange....rr)r}r$r¾rÚord)Úpryryrzr{s<zsrange..r¡c3rÂr‰ry)rŠÚpart©Ú _expandedryrzrŒ¯r zsrange..)r¾Ú_reBracketExprrBrÞr±rëryrârzra›s"ÿracó‡fdd„}|S)zt Helper method for defining parse actions that require matching at a specific column in the input text. cs"t||ƒˆkrt||dˆƒ‚dS)Nzmatched token not at column %dr)r‡Úlocnr’raryrzÚ verifyCol¸sÿz!matchOnlyAtCol..verifyColry)rbrçryrarzrO³srOcs‡fdd„S)a¹ Helper method for common parse actions that simply return a literal value. Especially useful when used with C{L{transformString}()}. Example:: num = Word(nums).setParseAction(lambda toks: int(toks[0])) na = oneOf("N/A NA").setParseAction(replaceWith(math.nan)) term = na | num OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234] csˆgSr‰ryr—©ÚreplStrryrzr{ÉszreplaceWith..ryrèryrèrzr^½sr^cCs|ddd…S)a Helper parse action for removing quotation marks from parsed quoted strings. Example:: # by default, quotation marks are included in parsed results quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"] # use removeQuotes to strip quotation marks from parsed results quotedString.setParseAction(removeQuotes) quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"] rrrtryr—ryryrzr\Ër8r\csL‡‡fdd„}ztˆdtˆdƒjƒ}Wn ty tˆƒ}Ynw||_|S)aG Helper to define a parse action by mapping a function to all elements of a ParseResults list.If any additional args are passed, they are forwarded to the given function as additional arguments after the token, as in C{hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))}, which will convert the parsed data to an integer using base 16. Example (compare the last to example in L{ParserElement.transformString}:: hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16)) hex_ints.runTests(''' 00 11 22 aa FF 0a 0d 1a ''') upperword = Word(alphas).setParseAction(tokenMap(str.upper)) OneOrMore(upperword).runTests(''' my kingdom for a horse ''') wd = Word(alphas).setParseAction(tokenMap(str.title)) OneOrMore(wd).setParseAction(' '.join).runTests(''' now is the winter of our discontent made glorious summer by this sun of york ''') prints:: 00 11 22 aa FF 0a 0d 1a [0, 17, 34, 170, 255, 10, 13, 26] my kingdom for a horse ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE'] now is the winter of our discontent made glorious summer by this sun of york ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York'] cs‡‡fdd„|DƒS)Ncsg|] }ˆ|gˆ¢RŽ‘qSryry)rŠÚtokn©r¬r™ryrzrúúrUz(tokenMap..pa..ryr—rëryrzrðùrÇztokenMap..parœr®)r°rœr±r)r™r¬rðr´ryrërzroÙs ÿÿrocCót|ƒ ¡Sr‰©rˆrÁrwryryrzr{rªcCrìr‰©rˆÚlowerrwryryrzr{rªc Cs¢t|tƒr|}t||d}n|j}tttdƒ}|rLt ¡ t ¡}tdƒ|dƒtt t|tdƒ|ƒƒƒtddgd d ¡ d d„¡tdƒ}nCd dd„tDƒ¡}t ¡ t ¡t|ƒB}tdƒ|dƒtt t| t¡ttdƒ|ƒƒƒƒtddgd d ¡ dd„¡tdƒ}ttdƒ|dƒ}| dd | dd¡ ¡ ¡¡¡ d|¡}| dd | dd¡ ¡ ¡¡¡ d|¡}||_||_||fS)zRInternal helper to construct opening and closing tag expressions, given a tag namerÇz_-:raÚtagú=ú/F©r-rEcSó|ddkS©Nrròryr—ryryrzr{rªz_makeTags..rbr¡css|] }|dvr|VqdS)rbNryr¤ryryrzrŒr‘z_makeTags..cSrôrõryr—ryryrzr{rªrcrÌú:rz<%s>råz)r}ròrrär1r6r5r@rór„r\r-r r4rrrÚr¾rXr[rDrÚ_Lr”Útitler’rÕrð)ÚtagStrÚxmlÚresnameÚtagAttrNameÚtagAttrValueÚopenTagZprintablesLessRAbrackÚcloseTagryryrzÚ _makeTagss> ÿþþÿÿýý..rcCó t|dƒS)a Helper to construct opening and closing tag expressions for HTML, given a tag name. Matches tags in either upper or lower case, attributes with namespaces and with quoted or unquoted values. Example:: text = 'More info at the pyparsing wiki page' # makeHTMLTags returns pyparsing expressions for the opening and closing tags as a 2-tuple a,a_end = makeHTMLTags("A") link_expr = a + SkipTo(a_end)("link_text") + a_end for link in link_expr.searchString(text): # attributes in the tag (like "href" shown here) are also accessible as named results print(link.link_text, '->', link.href) prints:: pyparsing -> http://pyparsing.wikispaces.com F©r©rùryryrzrM(s rMcCr)zº Helper to construct opening and closing tag expressions for XML, given a tag name. Matches tags only in the given upper/lower case. Example: similar to L{makeHTMLTags} TrrryryrzrN;s rNcs8|r |dd…‰n| ¡‰dd„ˆDƒ‰‡fdd„}|S)a< Helper to create a validating parse action to be used with start tags created with C{L{makeXMLTags}} or C{L{makeHTMLTags}}. Use C{withAttribute} to qualify a starting tag with a required attribute value, to avoid false matches on common tags such as C{} or C{

}. Call C{withAttribute} with a series of attribute names and values. Specify the list of filter attributes names and values as: - keyword arguments, as in C{(align="right")}, or - as an explicit dict with C{**} operator, when an attribute name is also a Python reserved word, as in C{**{"class":"Customer", "align":"right"}} - a list of name-value tuples, as in ( ("ns1:class", "Customer"), ("ns2:align","right") ) For attribute names with a namespace prefix, you must use the second form. Attribute names are matched insensitive to upper/lower case. If just testing for C{class} (with or without a namespace), use C{L{withClass}}. To verify that the attribute exists, but without specifying a value, pass C{withAttribute.ANY_VALUE} as the value. Example:: html = '''

1,3 2,3 1,1

this has no type

''' div,div_end = makeHTMLTags("div") # only match div tag having a type attribute with value "grid" div_grid = div().setParseAction(withAttribute(type="grid")) grid_expr = div_grid + SkipTo(div | div_end)("body") for grid_header in grid_expr.searchString(html): print(grid_header.body) # construct a match with any div tag having a type attribute, regardless of the value div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE)) div_expr = div_any_type + SkipTo(div | div_end)("body") for div_header in div_expr.searchString(html): print(div_header.body) prints:: 1 4 0 1 0 1 4 0 1 0 1,3 2,3 1,1 NcSsg|]\}}||f‘qSryryrXryryrzrúzrÛz!withAttribute..csZˆD](\}}||vrt||d|ƒ‚|tjkr*|||kr*t||d||||fƒ‚qdS)Nzno matching attribute z+attribute '%s' has value '%s', must be '%s')r!rgÚ ANY_VALUE)rr˜rÚattrNameÚ attrValue©Úattrsryrzrð{sÿ€üzwithAttribute..pa)r)r¬ÚattrDictrðryrrzrgDs2rgcCs"|rd|nd}tdi||i¤ŽS)aã Simplified version of C{L{withAttribute}} when matching on a div class - made difficult because C{class} is a reserved word in Python. Example:: html = '''

Some text

1 4 0 1 0

1,3 2,3 1,1

this <div> has no class

''' div,div_end = makeHTMLTags("div") div_grid = div().setParseAction(withClass("grid")) grid_expr = div_grid + SkipTo(div | div_end)("body") for grid_header in grid_expr.searchString(html): print(grid_header.body) div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE)) div_expr = div_any_type + SkipTo(div | div_end)("body") for div_header in div_expr.searchString(html): print(div_header.body) prints:: 1 4 0 1 0 1 4 0 1 0 1,3 2,3 1,1 z%s:classÚclassNry)rg)Ú classnameÚ namespaceÚ classattrryryrzrm…s rmú(r÷cCsˆtƒ}||||B}t|ƒD]-\}}|ddd…\}} } }| dkr(d|nd|}| dkrB|dus:t|ƒdkr>tdƒ‚|\} }tƒ |¡}| tjkr«| d kr`t||ƒt|t |ƒƒ}n¼| dkrŠ|dur{t|||ƒt|t ||ƒƒ}n¡t||ƒt|t |ƒƒ}n’| dkr§t|| |||ƒt|| |||ƒ}nutd ƒ‚| tj kr| d krÌt|tƒs¾t|ƒ}t|j |ƒt||ƒ}nP| dkrö|durçt|||ƒt|t ||ƒƒ}n5t||ƒt|t |ƒƒ}n&| dkrt|| |||ƒt|| |||ƒ}ntd ƒ‚tdƒ‚|r2t|ttfƒr-|j|Žn| |¡|| |¡|BK}|}q||K}|S)aD Helper method for constructing grammars of expressions made up of operators working in a precedence hierarchy. Operators may be unary or binary, left- or right-associative. Parse actions can also be attached to operator expressions. The generated parser will also recognize the use of parentheses to override operator precedences (see example below). Note: if you define a deep operator list, you may see performance issues when using infixNotation. See L{ParserElement.enablePackrat} for a mechanism to potentially improve your parser performance. Parameters: - baseExpr - expression representing the most basic element for the nested - opList - list of tuples, one for each operator precedence level in the expression grammar; each tuple is of the form (opExpr, numTerms, rightLeftAssoc, parseAction), where: - opExpr is the pyparsing expression for the operator; may also be a string, which will be converted to a Literal; if numTerms is 3, opExpr is a tuple of two expressions, for the two operators separating the 3 terms - numTerms is the number of terms for this operator (must be 1, 2, or 3) - rightLeftAssoc is the indicator whether the operator is right or left associative, using the pyparsing-defined constants C{opAssoc.RIGHT} and C{opAssoc.LEFT}. - parseAction is the parse action to be associated with expressions matching this operator expression (the parse action tuple member may be omitted); if the parse action is passed a tuple or list of functions, this is equivalent to calling C{setParseAction(*fn)} (L{ParserElement.setParseAction}) - lpar - expression for matching left-parentheses (default=C{Suppress('(')}) - rpar - expression for matching right-parentheses (default=C{Suppress(')')}) Example:: # simple example of four-function arithmetic with ints and variable names integer = pyparsing_common.signed_integer varname = pyparsing_common.identifier arith_expr = infixNotation(integer | varname, [ ('-', 1, opAssoc.RIGHT), (oneOf('* /'), 2, opAssoc.LEFT), (oneOf('+ -'), 2, opAssoc.LEFT), ]) arith_expr.runTests(''' 5+3*6 (5+3)*6 -2--11 ''', fullDump=False) prints:: 5+3*6 [[5, '+', [3, '*', 6]]] (5+3)*6 [[[5, '+', 3], '*', 6]] -2--11 [[['-', 2], '-', ['-', 11]]] r‰Nrérqz%s termz %s%s termrsz@if numterms=3, opExpr must be a tuple or list of two expressionsrz6operator must be unary (1), binary (2), or ternary (3)z2operator must indicate right or left associativity)rrrrfrÕrVÚLEFTrrrÚRIGHTr}rrŽrerír„)ÚbaseExprÚopListÚlparÚrparr‡ÚlastExprrÚÚoperDefÚopExprÚarityÚrightLeftAssocrðÚtermNameÚopExpr1ÚopExpr2ÚthisExprrÓryryrzrk¬sZ= &ÿ & ÿ rkz4"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*ú"z string enclosed in double quotesz4'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*ú'z string enclosed in single quotesz*quotedString using single or double quotesÚuzunicode string literalcCs–||krtdƒ‚|dur’t|tƒrŽt|tƒrŽt|ƒdkrQt|ƒdkrQ|dur>tt|t||tjddƒƒ dd„¡}nTt ¡t||tjƒ dd„¡}nA|durstt|t|ƒt|ƒttjddƒƒ dd„¡}nttt|ƒt|ƒttjddƒƒ d d„¡}ntd ƒ‚t ƒ}|dur®|tt|ƒt||B|Bƒt|ƒƒK}n|tt|ƒt||Bƒt|ƒƒK}| d||f¡|S)a~ Helper method for defining nested lists enclosed in opening and closing delimiters ("(" and ")" are the default). Parameters: - opener - opening character for a nested list (default=C{"("}); can also be a pyparsing expression - closer - closing character for a nested list (default=C{")"}); can also be a pyparsing expression - content - expression for items within the nested lists (default=C{None}) - ignoreExpr - expression for ignoring opening and closing delimiters (default=C{quotedString}) If an expression is not provided for the content argument, the nested expression will capture all whitespace-delimited content between delimiters as a list of separate values. Use the C{ignoreExpr} argument to define expressions that may contain opening or closing characters that should not be treated as opening or closing characters for nesting, such as quotedString or a comment expression. Specify multiple expressions using an C{L{Or}} or C{L{MatchFirst}}. The default is L{quotedString}, but if no expressions are to be ignored, then pass C{None} for this argument. Example:: data_type = oneOf("void int short long char float double") decl_data_type = Combine(data_type + Optional(Word('*'))) ident = Word(alphas+'_', alphanums+'_') number = pyparsing_common.number arg = Group(decl_data_type + ident) LPAR,RPAR = map(Suppress, "()") code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment)) c_function = (decl_data_type("type") + ident("name") + LPAR + Optional(delimitedList(arg), [])("args") + RPAR + code_body("body")) c_function.ignore(cStyleComment) source_code = ''' int is_odd(int x) { return (x%2); } int dec_to_hex(char hchar) { if (hchar >= '0' && hchar <= '9') { return (ord(hchar)-ord('0')); } else { return (10+ord(hchar)-ord('A')); } } ''' for func in c_function.searchString(source_code): print("%(name)s (%(type)s) args: %(args)s" % func) prints:: is_odd (int) args: [['int', 'x']] dec_to_hex (int) args: [['char', 'hchar']] z.opening and closing strings cannot be the sameNrr×cSó|d ¡SrÜ©r¿rwryryrzr{grªznestedExpr..cSr!rÜr"rwryryrzr{jrªcSr!rÜr"rwryryrzr{prªcSr!rÜr"rwryryrzr{trªzOopening and closing arguments must be strings if no content expression is givenznested %s%s expression)rfr}ròrrrrr&r·r„rErórrrr-r4rÕ)ÚopenerÚcloserÚcontentr‚r‡ryryrzrR%sH:ÿ þ ÿÿÿþ ýÿ þ*$rRcsä‡fdd„}‡fdd„}‡fdd„}ttƒ d¡ ¡ƒ}tƒtƒ |¡ d¡}tƒ |¡ d ¡}tƒ |¡ d ¡} |rStt|ƒ|t|t|ƒt|ƒƒ| ƒ} ntt|ƒt|t|ƒt|ƒƒƒ} | t tƒ¡| d¡S)a Helper method for defining space-delimited indentation blocks, such as those used to define block statements in Python source code. Parameters: - blockStatementExpr - expression defining syntax of statement that is repeated within the indented block - indentStack - list created by caller to manage indentation stack (multiple statementWithIndentedBlock expressions within a single grammar should share a common indentStack) - indent - boolean indicating whether block must be indented beyond the the current level; set to False for block of left-most statements (default=C{True}) A valid block must contain at least one C{blockStatement}. Example:: data = ''' def A(z): A1 B = 100 G = A2 A2 A3 B def BB(a,b,c): BB1 def BBA(): bba1 bba2 bba3 C D def spam(x,y): def eggs(z): pass ''' indentStack = [1] stmt = Forward() identifier = Word(alphas, alphanums) funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":") func_body = indentedBlock(stmt, indentStack) funcDef = Group( funcDecl + func_body ) rvalue = Forward() funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")") rvalue << (funcCall | identifier | Word(nums)) assignment = Group(identifier + "=" + rvalue) stmt << ( funcDef | assignment | identifier ) module_body = OneOrMore(stmt) parseTree = module_body.parseString(data) parseTree.pprint() prints:: [['def', 'A', ['(', 'z', ')'], ':', [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]], 'B', ['def', 'BB', ['(', 'a', 'b', 'c', ')'], ':', [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]], 'C', 'D', ['def', 'spam', ['(', 'x', 'y', ')'], ':', [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] csN|t|ƒkrdSt||ƒ}|ˆdkr%|ˆdkrt||dƒ‚t||dƒ‚dS)Nrtzillegal nestingznot a peer entry)rr;r#r!©rr˜rxÚcurCol©ÚindentStackryrzÚcheckPeerIndentÍs ýz&indentedBlock..checkPeerIndentcs0t||ƒ}|ˆdkrˆ |¡dSt||dƒ‚)Nrtznot a subentry)r;r6r!r&r(ryrzÚcheckSubIndentÕs z%indentedBlock..checkSubIndentcsN|t|ƒkrdSt||ƒ}ˆr|ˆdkr|ˆdks!t||dƒ‚ˆ ¡dS)Nrtrznot an unindent)rr;r!r1r&r(ryrzÚ checkUnindentÜs z$indentedBlock..checkUnindentz ÚINDENTr¡ÚUNINDENTzindented block)rrryrtrr„rÕrrr{r»)ÚblockStatementExprr)rgr*r+r,r|r-ÚPEERÚUNDENTÚsmExprryr(rzrhs(Nþþþÿ rhz#[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]z[\0xa1-\0xbf\0xd7\0xf7]z_:zany tagzgt lt amp nbsp quot aposz><& "'z&(?PrÁz);zcommon HTML entitycCst |j¡S)zRHelper parser action to replace common HTML entities with their special characters)Ú_htmlEntityMaprýÚentityrwryryrzr]÷r'r]z/\*(?:[^*]|\*(?!/))*z*/zC style commentzzHTML commentz.*zrest of linez//(?:\\\n|[^\n])*z // commentzC++ style commentz#.*zPython style commentrÔú Ú commaItemrór<c@sÐeZdZdZeeƒZ eeƒZ e e ƒ d¡ e¡Z e eƒ d¡ eedƒ¡Z edƒ d¡ e¡Z eƒ e¡deƒ e¡ d¡Z e d d „¡eeeedƒ ¡eƒB d¡Z e e¡ed ƒ d¡ e¡Z edƒ d¡ e¡Z eeBeB ¡Z edƒ d¡ e¡Z e ededƒ d¡Z edƒ d¡Z edƒ d¡Z!e!de!d d¡Z"ee!de!dƒdee!de!dƒ d¡Z#e# $dd „¡d e d!¡Z%e&e"e%Be#B d"¡ƒ d"¡Z' ed#ƒ d$¡Z( e)d=d&d'„ƒZ*e)d>d)d*„ƒZ+ed+ƒ d,¡Z, ed-ƒ d.¡Z- ed/ƒ d0¡Z. e/ ¡e0 ¡BZ1e)d1d2„ƒZ2e&e3e4d3ƒe5ƒe e6d3d4ee7d5ƒƒƒƒ ¡ d6¡Z8e9ee: ;¡e8Bd7d8ƒ d9¡Z< e)ed:d „ƒƒZ= e)ed;d „ƒƒZ>d}, L{reals}, L{scientific notation}) - common L{programming identifiers} - network addresses (L{MAC}, L{IPv4}, L{IPv6}) - ISO8601 L{dates} and L{datetime} - L{UUID} - L{comma-separated list} Parse actions: - C{L{convertToInteger}} - C{L{convertToFloat}} - C{L{convertToDate}} - C{L{convertToDatetime}} - C{L{stripHTMLTags}} - C{L{upcaseTokens}} - C{L{downcaseTokens}} Example:: pyparsing_common.number.runTests(''' # any int or real number, returned as the appropriate type 100 -100 +100 3.14159 6.02e23 1e-12 ''') pyparsing_common.fnumber.runTests(''' # any int or real number, returned as float 100 -100 +100 3.14159 6.02e23 1e-12 ''') pyparsing_common.hex_integer.runTests(''' # hex numbers 100 FF ''') pyparsing_common.fraction.runTests(''' # fractions 1/2 -3/4 ''') pyparsing_common.mixed_integer.runTests(''' # mixed fractions 1 1/2 -3/4 1-3/4 ''') import uuid pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID)) pyparsing_common.uuid.runTests(''' # uuid 12345678-1234-5678-1234-567812345678 ''') prints:: # any int or real number, returned as the appropriate type 100 [100] -100 [-100] +100 [100] 3.14159 [3.14159] 6.02e23 [6.02e+23] 1e-12 [1e-12] # any int or real number, returned as float 100 [100.0] -100 [-100.0] +100 [100.0] 3.14159 [3.14159] 6.02e23 [6.02e+23] 1e-12 [1e-12] # hex numbers 100 [256] FF [255] # fractions 1/2 [0.5] -3/4 [-0.75] # mixed fractions 1 [1] 1/2 [0.5] -3/4 [-0.75] 1-3/4 [1.75] # uuid 12345678-1234-5678-1234-567812345678 [UUID('12345678-1234-5678-1234-567812345678')] Úintegerzhex integerrØz[+-]?\d+zsigned integerròÚfractioncCs|d|dS)Nrrtryrwryryrzr{´r¾zpyparsing_common.r/z"fraction or mixed integer-fractionz [+-]?\d+\.\d*zreal numberz+[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)z$real number with scientific notationz[+-]?\d+\.?\d*([eE][+-]?\d+)?ÚfnumberrKÚ identifierzK(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}zIPv4 addressz[0-9a-fA-F]{1,4}Úhex_integerröézfull IPv6 address)rr§z::zshort IPv6 addresscCstdd„|DƒƒdkS)Ncss |]}tj |¡rdVqdSr^)rpÚ _ipv6_partrHr¯ryryrzrŒÐrYz,pyparsing_common...rÜ)r_rwryryrzr{ÐrOz::ffff:zmixed IPv6 addresszIPv6 addressz:[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}zMAC addressú%Y-%m-%dcrå)aØ Helper to create a parse action for converting parsed date string to Python datetime.date Params - - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%d"}) Example:: date_expr = pyparsing_common.iso8601_date.copy() date_expr.setParseAction(pyparsing_common.convertToDate()) print(date_expr.parseString("1999-12-31")) prints:: [datetime.date(1999, 12, 31)] c s@zt |dˆ¡ ¡WSty}zt||t|ƒƒ‚d}~wwrÜ)rÚstrptimeÚdaterfr!r©rr˜rxÚve©ÚfmtryrzÚcvt_fnçs€ÿz.pyparsing_common.convertToDate..cvt_fnry©rDrEryrCrzÚ convertToDateØózpyparsing_common.convertToDateú%Y-%m-%dT%H:%M:%S.%fcrå)a Helper to create a parse action for converting parsed datetime string to Python datetime.datetime Params - - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%dT%H:%M:%S.%f"}) Example:: dt_expr = pyparsing_common.iso8601_datetime.copy() dt_expr.setParseAction(pyparsing_common.convertToDatetime()) print(dt_expr.parseString("1999-12-31T23:59:59.999")) prints:: [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)] c s<z t |dˆ¡WSty}zt||t|ƒƒ‚d}~wwrÜ)rr?rfr!rrArCryrzrEýs€ÿz2pyparsing_common.convertToDatetime..cvt_fnryrFryrCrzÚconvertToDatetimeîrHz"pyparsing_common.convertToDatetimez7(?P\d{4})(?:-(?P\d\d)(?:-(?P\d\d))?)?zISO8601 datez†(?P\d{4})-(?P\d\d)-(?P\d\d)[T ](?P\d\d):(?P\d\d)(:(?P\d\d(\.\d*)?)?)?(?PZ|[+-]\d\d:?\d\d)?zISO8601 datetimez2[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}ÚUUIDcCstj |d¡S)a Parse action to remove HTML tags from web page HTML source Example:: # strip HTML links from normal text text = 'More info at the pyparsing wiki page' td,td_end = makeHTMLTags("TD") table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end print(table_text.parseString(text).body) # -> 'More info at the pyparsing wiki page' r)rpÚ_html_stripperr…)rr˜rryryrzÚ stripHTMLTagss zpyparsing_common.stripHTMLTagsr£rÔr5r6r¡rózcomma separated listcCrìr‰rírwryryrzr{"rªcCrìr‰rîrwryryrzr{%rªN)r>)rI)?rœrržrÈrorvÚconvertToIntegerÚfloatÚconvertToFloatr1rTrÕr„r7rFr;r)Úsigned_integerr8rêrrtÚ mixed_integerr_ÚrealÚsci_realr=Únumberr9r6r5r:Úipv4_addressr=Ú_full_ipv6_addressÚ_short_ipv6_addressrñÚ_mixed_ipv6_addressrÚipv6_addressÚmac_addressrrGrJÚiso8601_dateÚiso8601_datetimeÚuuidr9r8rLrMrrrrXr0Ú _commasepitemrBr[róÚcomma_separated_listrfrDryryryrzrps€"" 2 ÿ ÿrpÚ__main__ÚselectÚfromr¾rœ)r¥ÚcolumnsrÖZtablesÚcommandaK # '*' as column list and dotted table name select * from SYS.XYZZY # caseless match on "SELECT", and casts back to "select" SELECT * from XYZZY, ABC # list of column names, and mixed case SELECT keyword Select AA,BB,CC from Sys.dual # multiple tables Select A, B, C from Sys.dual, Table2 # invalid SELECT keyword - should fail Xelect A, B, C from Sys.dual # incomplete command - should fail Select # invalid column name - should fail Select ^^^ frox Sys.dual z] 100 -100 +100 3.14159 6.02e23 1e-12 z 100 FF z6 12345678-1234-5678-1234-567812345678 )rs)r£Fr‰)FTr¬r„)ãrÈÚ__version__Ú__versionTime__Ú __author__r¢Úweakrefrrþrór‚rYrÎrñr/r}r¡rrÚ_threadrÚImportErrorÚ threadingÚcollections.abcrrrr)ZordereddictÚ__all__reÚversion_infor rZÚmaxsizer®rròÚchrrÙrˆr_rrwÚreversedrírryr'rârãr¯ZmaxintÚxrangerÚ__builtin__r’Úfnamer6r°r´rÅrïršràr›Úascii_uppercaseÚascii_lowercaser6rTrFr5r»r¾Ú printablerXr±rr!r#r%r(rÒr$Úregisterr;rLrIrr“r•rSrµr&r.rrrr÷r»rr r rnr1r)r'rr0rrrrr,r+r3r2r"rrrrr rrrtrr4r€rrr*rrŽr/rrr r-rrdrBr>rMrQrPrÞrUrCrirjrlrÕrErKrJrcrbr„Ú_escapedPuncÚ_escapedHexCharÚ_escapedOctCharÚ_singleCharÚ _charRangerÚrärarOr^r\rorfrDrrMrNrgrrmrVrrrkrWr@r`r[rerRrhr7rYr9r8rðr“r3r&r=r]r:rGrwr_rAr?rHrZr=r_r<rprœZselectTokenZ fromTokenÚidentZ columnNameZcolumnNameListZ columnSpecZ tableNameZ tableNameListZ simpleSQLrªrUr9r;r^rKryryryrzÚsúÿ4ÿýÿ€ýÿ 8 @v&A= I G3pLOD|M &#@sQ,A, I#%0 , ?#p ÿÿZr ÿÿÿþ" " ½