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Method to take an exception and translate the Python internal traceback into a list
of the pyparsing expressions that caused the exception to be raised.
Parameters:
- exc - exception raised during parsing (need not be a ParseException, in support
of Python exceptions that might be raised in a parse action)
- depth (default=16) - number of levels back in the stack trace to list expression
and function names; if None, the full stack trace names will be listed; if 0, only
the failing input line, marker, and exception string will be shown
Returns a multi-line string listing the ParserElements and/or function names in the
exception's stack trace.
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internal factory method to simplify creating one type of ParseException
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Return the line of text where the exception occurred.
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Return the 1-based line number of text where the exception occurred.
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Return the 1-based column on the line of text where the exception occurred.
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__str__ s zParseBaseException.__str__c C s t | S N)strrG r r r
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Extracts the exception line from the input string, and marks
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Method to translate the Python internal traceback into a list
of the pyparsing expressions that caused the exception to be raised.
Parameters:
- depth (default=16) - number of levels back in the stack trace to list expression
and function names; if None, the full stack trace names will be listed; if 0, only
the failing input line, marker, and exception string will be shown
Returns a multi-line string listing the ParserElements and/or function names in the
exception's stack trace.
Example::
expr = pp.Word(pp.nums) * 3
try:
expr.parse_string("123 456 A789")
except pp.ParseException as pe:
print(pe.explain(depth=0))
prints::
123 456 A789
^
ParseException: Expected W:(0-9), found 'A' (at char 8), (line:1, col:9)
Note: the diagnostic output will include string representations of the expressions
that failed to parse. These representations will be more helpful if you use `set_name` to
give identifiable names to your expressions. Otherwise they will use the default string
forms, which may be cryptic to read.
Note: pyparsing's default truncation of exception tracebacks may also truncate the
stack of expressions that are displayed in the ``explain`` output. To get the full listing
of parser expressions, you may have to set ``ParserElement.verbose_stacktrace = True``
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Exception thrown when a parse expression doesn't match the input string
Example::
try:
Word(nums).set_name("integer").parse_string("ABC")
except ParseException as pe:
print(pe)
print("column: {}".format(pe.column))
prints::
Expected integer (at char 0), (line:1, col:1)
column: 1
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User-throwable exception thrown when inconsistent parse content
is found; stops all parsing immediately
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Just like :class:`ParseFatalException`, but thrown internally
when an :class:`ErrorStop` ('-' operator) indicates
that parsing is to stop immediately because an unbacktrackable
syntax error has been found.
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ri s ri c @ s& e Zd ZdZdd ZedddZdS )RecursiveGrammarExceptionz
Exception thrown by :class:`ParserElement.validate` if the
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