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TFN)r5Ú setdefaultr4rârjrF)r¢r:r§s rr9zWorkingSet.add_entry“sK€ð ‰×"Ñ" 5¨"Ô-Ø‰×Ñ˜EÔ"Ü& u¨dÖ3ˆDØH‰HT˜5 %Õ(ñ4rcóR—|jj|j«|k(S)z9True if `dist` is the active distribution for its project)r6rër=©r¢r§s rÚ__contains__zWorkingSet.__contains__¢s€à{‰{‰˜tŸx™xÓ(¨DÑ0Ð0rcó —|jj|j«}|€I|jj|j«}|"||_|jj|«}|||vrt ||«‚|S)aÐFind a distribution matching requirement `req` If there is an active distribution for the requested project, this returns it as long as it meets the version requirement specified by `req`. But, if there is an active distribution for the project and it does *not* meet the `req` requirement, ``VersionConflict`` is raised. If there is no active distribution for the requested project, ``None`` is returned. )r6rër=r7ru)r¢r¬r§Ú canonical_keys rrÎzWorkingSet.find¦sv€ð{‰{‰˜sŸw™wÓ'ˆàˆ<Ø ×=Ñ=×AÑAÀ#Ç'Á'ÓJˆMàÐ(Ø'”Ø—{‘{—‘ }Ó5àÐ ¨C¡ä! $¨Ó,Ð,Øˆrcó‡‡—ˆˆfd„|D«S)aYield entry point objects from `group` matching `name` If `name` is None, yields all entry points in `group` from all distributions in the working set, otherwise only ones matching both `group` and `name` are yielded (in distribution order). c3óŒ•K—|];}|j‰«j«D]}‰‰|jk(r|–—ŒŒ=ywr )r^Úvaluesr )Ú.0r§r:rTr s €€rÚ z/WorkingSet.iter_entry_points..ÅsJøèø€ð áØ×+Ñ+¨EÓ2×9Ñ9Ö;Øˆ|˜t u§z¡zÒ1ô à;ð ÙùsƒAAr©r¢rTr s ``rr`zWorkingSet.iter_entry_points¾sù€ô áó ð rcó¾—tjd«j}|d}|j«||d<|j |«dj||«y)z?Locate distribution for `requires` and run `script_name` scriptr«rrNr)r¢Úrequiresrrr s rrZzWorkingSet.run_scriptÌsO€ä ]‰]˜1Ó × 'Ñ 'ˆØ*‰~ˆØ ‰Œ Øˆˆ:‰Ø‰XÓ˜qÑ!×,Ñ,¨[¸"Õ=rc#ó®K—i}|jD]@}||jvrŒ|j|D]}||vsŒd||<|j|–—ŒŒByw)z¸Yield distributions for non-duplicate projects in the working set The yield order is the order in which the items' path entries were added to the working set. r«N)r4r5r6)r¢ÚseenÚitemr=s rÚ__iter__zWorkingSet.__iter__Ôs\èø€ðˆØ—L”LˆDØ˜4Ÿ?™?Ñ*àà—‘ tÔ,Ø˜d’?Ø !D˜‘IØŸ+™+ cÑ*Ó*ñ-ñ!ùs ‚7AºAcó–—|r|j|j||¬«|€|j}|jj |g«}|jj |jg«}|s|j |jvry||j|j <tjj|j «}|j |j|<|j |vr|j|j «|j |vr|j|j «|j|«y)aAdd `dist` to working set, associated with `entry` If `entry` is unspecified, it defaults to the ``.location`` of `dist`. On exit from this routine, `entry` is added to the end of the working set's ``.entries`` (if it wasn't already present). `dist` is only added to the working set if it's for a project that doesn't already have a distribution in the set, unless `replace=True`. If it's added, any callbacks registered with the ``subscribe()`` method will be called. ©rõN) Ú insert_onr4Úlocationr5rKr=r6rÚutilsÚcanonicalize_namer7râÚ _added_new)r¢r§r:ÚinsertrõÚkeysÚkeys2Únormalized_names rrFzWorkingSet.addåsò€ñØN‰N˜4Ÿ<™<¨¸ˆNÔ@àˆ=Ø—M‘MˆEØ‰×)Ñ)¨%°Ó4ˆØ—‘×*Ñ*¨4¯=©=¸"Ó=ˆÙ˜4Ÿ8™8 t§{¡{Ñ2àà $ˆ‰D—H‘HÑÜ#Ÿ/™/×;Ñ;¸D¿H¹HÓEˆØ=A¿X¹Xˆ×)Ñ)¨/Ñ:Ø8‰8˜4ÑØK‰K˜Ÿ™Ô!Ø8‰8˜5Ñ ØL‰L˜Ÿ™Ô"Ø‰˜Õrc óÚ—t|«ddd…}i}i}g}t«} tjt«} |r®|jd«}||vrŒ| j ||«sŒ+|j|||||| |«}|j|j«ddd…} |j| «| D]/}| |j|j«|j| |<Œ1d||<|rŒ®|S)aÎList all distributions needed to (recursively) meet `requirements` `requirements` must be a sequence of ``Requirement`` objects. `env`, if supplied, should be an ``Environment`` instance. If not supplied, it defaults to all distributions available within any entry or distribution in the working set. `installer`, if supplied, will be invoked with each requirement that cannot be met by an already-installed distribution; it should return a ``Distribution`` or ``None``. Unless `replace_conflicting=True`, raises a VersionConflict exception if any requirements are found on the path that have the correct name but the wrong version. Otherwise, if an `installer` is supplied it will be invoked to obtain the correct version of the requirement and activate it. `extras` is a list of the extras to be used with these requirements. This is important because extra requirements may look like `my_req; extra = "my_extra"`, which would otherwise be interpreted as a purely optional requirement. Instead, we want to be able to assert that these requirements are truly required. NrÆrT) ÚlistÚ _ReqExtrasÚcollectionsÚdefaultdictÚsetÚpopÚmarkers_passÚ _resolve_distrXÚextrasÚextendrFÚproject_name)r¢ÚrequirementsÚenvÚ installerÚreplace_conflictingrqÚ processedÚbestÚto_activateÚ req_extrasr·r¬r§Únew_requirementsÚnew_requirements rrEzWorkingSet.resolves €ôB˜LÓ)©$¨B¨$Ñ/ˆàˆ àˆØˆä“\ˆ ô"×-Ñ-¬cÓ2ˆáà×"Ñ" 1Ó%ˆCØiÑàà×*Ñ*¨3°Ô7Øà×%Ñ%ØTÐ.°°YÀÈ[óˆDð $Ÿ}™}¨S¯Z©ZÓ8¹¸2¸Ñ>ÐØ×ÑÐ 0Ô1ó$4Ø˜OÑ,×0Ñ0°×1AÑ1AÔBØ.1¯j©j ˜?Ò+ð$4ð"ˆIc‰Nò/ð4Ðrcóð—|j|j«}|€´|jj|j«}|||vrx|rv|} |€.|€t|j«}ntg«}tg«} |j || ||¬«x}||j<|€|j|d«} t|| «‚|j|«||vr ||}t||«j|«‚|S)N)rw)rër=r6rnr4roÚ best_matchrvrârur¸)r¢r¬ryrwrurvr·rzr§rBr¿Ú dependent_reqs rrpzWorkingSet._resolve_distOsü€ðx‰x˜Ÿ™Ó ˆØˆ<à—;‘;—?‘? 3§7¡7Ó+ˆDØˆ| ¨C¡Ñ4GØØ;Ø|Ü)¨$¯,©,Ó7™ô *¨"›o˜Ü'¨›^˜Ø'*§~¡~Ø˜˜YÐÐ>Ø×Ñ˜tÔ$Øs‰?à'¨Ñ,ˆMÜ! $¨Ó,×9Ñ9¸-ÓHÐHØˆrcó\—t|«}|j«i}i}|€t|j«}||z }n||z}|j g«} tt| j|««|D]u} || D]k}|j«g} | j|||«} tt| j| ««|jtj| ««ŒuŒwt|«}|j«||fS#t$r}|||<|rYd}~Œ¤Yd}~Œ²d}~wwxYw)asFind all activatable distributions in `plugin_env` Example usage:: distributions, errors = working_set.find_plugins( Environment(plugin_dirlist) ) # add plugins+libs to sys.path map(working_set.add, distributions) # display errors print('Could not load', errors) The `plugin_env` should be an ``Environment`` instance that contains only distributions that are in the project's "plugin directory" or directories. The `full_env`, if supplied, should be an ``Environment`` contains all currently-available distributions. If `full_env` is not supplied, one is created automatically from the ``WorkingSet`` this method is called on, which will typically mean that every directory on ``sys.path`` will be scanned for distributions. `installer` is a standard installer callback as used by the ``resolve()`` method. The `fallback` flag indicates whether we should attempt to resolve older versions of a plugin if the newest version cannot be resolved. This method returns a 2-tuple: (`distributions`, `error_info`), where `distributions` is a list of the distributions found in `plugin_env` that were loadable, along with any other distributions that are needed to resolve their dependencies. `error_info` is a dictionary mapping unloadable plugin distributions to an exception instance describing the error that occurred. Usually this will be a ``DistributionNotFound`` or ``VersionConflict`` instance. N) riÚsortrnr4rŸÚmaprFÚas_requirementrEr"r$r%rt)r¢Ú plugin_envÚfull_envrvÚfallbackÚplugin_projectsÚ error_infoÚ distributionsruÚ shadow_setrsr§r¬Ú resolveesr0s rÚfind_pluginszWorkingSet.find_pluginsns,€ôF˜zÓ*ˆà×ÑÔàˆ Øˆ àÐÜ˜dŸl™lÓ+ˆCØ:Ñ‰Cà˜ZÑ'ˆCà—^‘^ BÓ'ˆ äŒS—‘ Ó &Ô'ã+ˆLØ" <Ô0Ø×*Ñ*Ó,Ð-ðØ *× 2Ñ 2°3¸¸YÓ GIôœ˜ZŸ^™^¨YÓ7Ô8Ø!×(Ñ(¬¯©°yÓ)AÔBññ+1ð,ô0˜]Ó+ˆ Ø×ÑÔà˜jÐ(Ð(øô)'òà'(J˜tÑ$Ùä õûðúsÂDÄ D+ÄD&Ä&D+cój—|jt|««}|D]}|j|«Œ|S)a¾Ensure that distributions matching `requirements` are activated `requirements` must be a string or a (possibly-nested) sequence thereof, specifying the distributions and versions required. The return value is a sequence of the distributions that needed to be activated to fulfill the requirements; all relevant distributions are included, even if they were already activated in this working set. )rEryrF)r¢rtÚneededr§s rrYzWorkingSet.require¿s4€ð—‘Ô0°Ó>Ó?ˆãˆDØH‰HTNððˆ rcó|—||jvry|jj|«|sy|D] }||«Œy)zƒInvoke `callback` for all distributions If `existing=True` (default), call on all existing ones, as well. N)r8râ)r¢ÚcallbackÚexistingr§s rÚ subscribezWorkingSet.subscribeÏs<€ðt—~‘~Ñ%ØØ‰×Ñ˜hÔ'ÙØÛˆDÙTNñrcó6—|jD] }||«Œyr )r8)r¢r§r‘s rrczWorkingSet._added_newÝs€ØŸœˆHÙTNñ'rcóÔ—|jdd|jj«|jj«|jj«|j ddfSr )r4r5r6r6r7r8r¡s rr1zWorkingSet.__getstate__ásU€àL‰L™ˆOØO‰O× Ñ Ó"ØK‰K×ÑÓØ×-Ñ-×2Ñ2Ó4ØN‰N™1Ðð ð rcóº—|\}}}}}|dd|_|j«|_|j«|_|j«|_|dd|_yr )r4r6r5r6r7r8)r¢Ú e_k_b_n_cr4rer6r7r8s rr4zWorkingSet.__setstate__êsT€ØIRÑFˆvÐ;¸YØ™qzˆŒØŸ)™)›+ˆŒØ—k‘k“mˆŒØ,H×,MÑ,MÓ,OˆÔ)Ø"¡1˜ˆrr )NTF)NNFN)NNT©T)rrrrr;ÚclassmethodrCr@r9rNrÎr`rZr\rFrErprrYr“rcr1r4rrrroroXs„ÙNó"ðñóðð&ñóðò* )ò1òó0 ò>ò+ó"ðF ØØ!Øó HòTó>O)òbó òò ó&rrocó—eZdZdZdd„Zy)rjz> Map each requirement to the extras that demanded it. Ncó|‡—ˆfd„|j‰d«|xsdzD«}‰jxst|«S)z» Evaluate markers for req against each extra that demanded it. Return False if the req has a marker and fails evaluation. Otherwise, return True. c3óX•K—|]!}‰jjd|i«–—Œ#yw)ÚextraN©ÚmarkerÚevaluate)rTrr¬s €rrUz*_ReqExtras.markers_pass..s-øèø€ð á@ð J‰J×Ñ ¨%Ð 0×1Ù@ùsƒ'*rr )rërŸÚany)r¢r¬rqÚextra_evalss ` rroz_ReqExtras.markers_passøs?ø€ó àŸ™ # rÓ*¨fÒ.?¸Ò@ó ˆð—:‘:ˆ~Ò1¤ [Ó!1Ð1rr )rrrrrorrrrjrjós„ñô2rrjcój—eZdZdZde«efd„Zd„Zd„Zdd„Z d„Z d„Zdd „Zdd „Z d„Zd„Zd „Zy)rnz5Searchable snapshot of distributions on a search pathNcóP—i|_||_||_|j|«y)a!Snapshot distributions available on a search path Any distributions found on `search_path` are added to the environment. `search_path` should be a sequence of ``sys.path`` items. If not supplied, ``sys.path`` is used. `platform` is an optional string specifying the name of the platform that platform-specific distributions must be compatible with. If unspecified, it defaults to the current platform. `python` is an optional string naming the desired version of Python (e.g. ``'3.6'``); it defaults to the current version. You may explicitly set `platform` (and/or `python`) to ``None`` if you wish to map *all* distributions, not just those compatible with the running platform or Python version. N)Ú_distmaprQÚpythonÚscan)r¢Úsearch_pathrQr¦s rr;zEnvironment.__init__ s%€ð&ˆŒ Ø ˆŒ ØˆŒØ ‰ +Õrcó¼—|jduxs)|jduxs|j|jk(}|xr t|j|j«S)zåIs distribution `dist` acceptable for this environment? The distribution must match the platform and python version requirements specified when this environment was created, or False is returned. N)r¦Ú py_versionr~rQ)r¢r§Ú py_compats rÚcan_addzEnvironment.can_add"sX€ð K‰K˜4Ðò .Ø‰ $Ð&ò .à‰ $§+¡+Ñ-ð ð ÒOÔ1°$·-±-ÀÇÁÓOÐOrcóT—|j|jj|«y)z"Remove `dist` from the environmentN)r¥r=ÚremoverMs rr®zEnvironment.remove0s€à ‰ d—h‘hÑ×&Ñ& tÕ,rcóx—|€tj}|D]#}t|«D]}|j|«ŒŒ%y)adScan `search_path` for distributions usable in this environment Any distributions found are added to the environment. `search_path` should be a sequence of ``sys.path`` items. If not supplied, ``sys.path`` is used. Only distributions conforming to the platform/python version defined at initialization are added. N)rPrÞrjrF)r¢r¨r[r§s rr§zEnvironment.scan4s7€ðÐÜŸ(™(ˆKãˆDÜ*¨4Ö0Ø—‘˜•ñ1ñ rcóZ—|j«}|jj|g«S)aReturn a newest-to-oldest list of distributions for `project_name` Uses case-insensitive `project_name` comparison, assuming all the project's distributions use their project's name converted to all lowercase as their key. )Úlowerr¥rë)r¢rsÚdistribution_keys rÚ__getitem__zEnvironment.__getitem__Cs+€ð(×-Ñ-Ó/ÐØ}‰}× Ñ Ð!1°2Ó6Ð6rcó—|j|«rt|j«rc|jj|jg«}||vr8|j|«|j tjd«d¬«yyyy)zCAdd `dist` if we ``can_add()`` it and it has not already been addedÚhashcmpT)r=ÚreverseN) r¬Úhas_versionr¥rKr=râr‚ÚoperatorÚ attrgetter)r¢r§rIs rrFzEnvironment.addNso€à<‰<˜Ô $×"2Ñ"2Ô"4Ø—M‘M×,Ñ,¨T¯X©X°rÓ:ˆEØ˜5Ñ Ø—‘˜TÔ"Ø— ‘ œx×2Ñ2°9Ó=Àt ÕLð!ð#5Ðrcó²— |j|«}||S||jD] }||vsŒ|cS|j||«S#t$r|s‚d}YŒBwxYw)a¸Find distribution best matching `req` and usable on `working_set` This calls the ``find(req)`` method of the `working_set` to see if a suitable distribution is already active. (This may raise ``VersionConflict`` if an unsuitable version of the project is already active in the specified `working_set`.) If a suitable distribution isn't active, this method returns the newest distribution in the environment that meets the ``Requirement`` in `req`. If no suitable distribution is found, and `installer` is supplied, then the result of calling the environment's ``obtain(req, installer)`` method will be returned. N)rÎrur=Úobtain)r¢r¬rhrvrwr§s rrzEnvironment.best_matchVsq€ð Ø×#Ñ# CÓ(ˆDð ÐØˆKØ˜Ÿ™”MˆDØsŠ{Ø’ð"ð{‰{˜3 Ó*Ð*øôò Ù&ØØŠDð ús‚AÁAÁAcó—|||«Sy)aÞObtain a distribution matching `requirement` (e.g. via download) Obtain a distro that matches requirement (e.g. via download). In the base ``Environment`` class, this routine just returns ``installer(requirement)``, unless `installer` is None, in which case None is returned instead. This method is a hook that allows subclasses to attempt other ways of obtaining a distribution before falling back to the `installer` argument.Nr)r¢Úrequirementrvs rr»zEnvironment.obtainqs€ðÐ Ù˜[Ó)Ð)ð!rc#ó^K—|jj«D]}||sŒ |–—Œyw)z=Yield the unique project names of the available distributionsN)r¥re©r¢r=s rr\zEnvironment.__iter__}s)èø€à—=‘=×%Ñ%Ö'ˆCØC‹yØ“ ñ(ùs‚#-¦-cóÎ—t|t«r|j|«|St|t«r$|D]}||D]}|j|«ŒŒ|St d|›d«‚)z2In-place addition of a distribution or environmentz Can't add z to environment)rÍrqrFrnr)r¢ÚotherÚprojectr§s rÚ__iadd__zEnvironment.__iadd__ƒsd€äeœ\Ô*ØH‰HUŒOðˆô ˜œ{Ô +Û Ø! 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You can change the cache directory by setting the PYTHON_EGG_CACHE environment variable to point to an accessible directory. r) rPÚexc_infoÚextraction_pathrmÚtextwrapÚdedentÚlstriprxr±r²r&Ú cache_pathÚoriginal_error)r¢Úold_excrÝÚtmplÚerrs rÚextraction_errorz ResourceManager.extraction_errorÑs~€ô—,‘,“. Ñ#ˆØ×)Ñ)Ò@Ô->Ó-@ˆ ä‰ð ó ÷"‰&‹(ð# ô$˜k˜dŸk™kÑ5¬F«HÑ5Ó6ˆØˆŒØ#ˆŒØ$ˆÔØˆ rcó—|jxs t«}tjj||dzg|¢Ž} t|«|j|«d|j|<|S#t$r|j«YŒ=wxYw)a®Return absolute location in cache for `archive_name` and `names` The parent directory of the resulting path will be created if it does not already exist. `archive_name` should be the base filename of the enclosing egg (which may not be the name of the enclosing zipfile!), including its ".egg" extension. `names`, if provided, should be a sequence of path name parts "under" the egg's extraction location. This method should only be called by resource providers that need to obtain an extraction location, and only for names they intend to extract, as it tracks the generated names for possible cleanup later. z-tmpr«) rÙrmrÝrÞrRÚ_bypass_ensure_directoryÚ ExceptionrâÚ_warn_unsafe_extraction_pathrÍ)r¢Úarchive_nameÚnamesÚextract_pathÚtarget_paths rÚget_cache_pathzResourceManager.get_cache_pathïs†€ð×+Ñ+ÒBÔ/@Ó/BˆÜ—g‘g—l‘l <°ÀÑ1FÐOÈÒOˆð $Ü$ [Ô1ð ×)Ñ)¨,Ô7à)*ˆ×Ñ˜+Ñ&ØÐøô ò $Ø×!Ñ!Ö#ð $ús¾A+Á+BÂBcód—tjdk(r#|jtjd«sytj|«j }|tjzs|tjzr5djdit«¤Ž}tj|t«yy)aN If the default extraction path is overridden and set to an insecure location, such as /tmp, it opens up an opportunity for an attacker to replace an extracted file with an unauthorized payload. Warn the user if a known insecure location is used. See Distribute #375 for more details. ÚntÚwindirNzáExtraction path is writable by group/others and vulnerable to attack when used with get_resource_filename ({path}). Consider a more secure location (set with .set_extraction_path or the PYTHON_EGG_CACHE environment variable).r) rÝr róÚenvironÚstatÚst_modeÚS_IWOTHÚS_IWGRPr±r²ÚwarningsÚwarnÚUserWarning)rÞÚmodeÚmsgs rræz,ResourceManager._warn_unsafe_extraction_paths‹€ô7‰7dŠ? 4§?¡?´2·:±:¸hÑ3GÔ#Hð Üw‰wt‹}×$Ñ$ˆØ”$—,‘,Ò $¬¯©Ò"5ðð:÷‰fñ!ô“xñ!ˆCô M‰M˜#œ{Õ+ð#6rcó¢—tjdk(r‰>Ð,Ó-ò´×1LÑ1LØô2ðrcó0—tjdd|«S)zConvert an arbitrary string to a standard distribution name Any runs of non-alphanumeric/. characters are replaced with a single '-'. ú[^A-Za-z0-9.]+rL)ÚreÚsubrs rr{r{hs€ô 6‰6Ð" C¨Ó.Ð.rcóì— ttjj|««S#tjj$r,|jdd«}t jdd|«cYSwxYw)zB Convert an arbitrary string to a standard version string rðrKrrL)rÏrräÚVersionÚInvalidVersionrõrr )räs rr|r|psb€ð6ä”9×$Ñ$×,Ñ,¨WÓ5Ó6Ð6øÜ×Ñ×+Ñ+ò6Ø—/‘/ # sÓ+ˆÜv‰vÐ&¨¨WÓ5Ò5ð6ús‚'*ªAA3Á2A3cóÌ—|jdd«}tj|«}|r|d}|t|«d}nd}|}dt |«›jd«}|›d|›S)aFallback when ``safe_version`` is not safe enough >>> parse_version(_forgiving_version('0.23ubuntu1')) >>> parse_version(_forgiving_version('0.23-')) >>> parse_version(_forgiving_version('0.-_')) >>> parse_version(_forgiving_version('42.+?1')) >>> parse_version(_forgiving_version('hello world')) rðrKÚsafeNÚ0z sanitized.z.dev0+)rõÚ_PEP440_FALLBACKÚsearchÚlenÚ _safe_segmentÚstrip)rärOrÚrestÚlocals rÚ_forgiving_versionr|sx€ðo‰o˜c 3Ó'€GÜ×#Ñ# GÓ,€EÙØV‰}ˆØ”s˜4“y{Ð#‰àˆØˆØœ tÓ,Ð-Ð.×4Ñ4°SÓ9€EØˆV6˜%˜Ð!Ð!rcóª—tjdd|«}tjdd|«}tjdd|«jd«S)z/Convert an arbitrary string into a safe segmentrrLz-[^A-Za-z0-9]+z\.[^A-Za-z0-9]+rKz.-)rr r)Úsegments rrr•sG€äf‰fÐ% s¨GÓ4€GÜf‰fÐ% s¨GÓ4€GÜ 6‰6Ð$ c¨7Ó3×9Ñ9¸$Ó?Ð?rcóL—tjdd|«j«S)z±Convert an arbitrary string to a standard 'extra' name Any runs of non-alphanumeric characters are replaced with a single '_', and the result is always lowercased. z[^A-Za-z0-9.-]+rñ)rr r±)rs rr€r€œs!€ô6‰6Ð# S¨%Ó0×6Ñ6Ó8Ð8rcó&—|jdd«S)z|Convert a project or version name to its filename-escaped form Any '-' characters are currently replaced with '_'. rLrñr^rs rrr¥s€ð <‰<˜˜SÓ!Ð!rcóh— t|«y#t$r}d|_d|_|cYd}~Sd}~wwxYw)zo Validate text as a PEP 508 environment marker; return an exception if invalid or False otherwise. NF)rƒÚSyntaxErrorrýÚlineno)ÚtextÚes rr‚r‚s9€ð Ü˜Ôð øô òØˆŒ ØˆŒØûðús‚Ž 1—,¦1¬1cóÄ— tjj|«}|j«S#tjj$r}t|«|‚d}~wwxYw)zÙ Evaluate a PEP 508 environment marker. Return a boolean indicating the marker result in this environment. Raise SyntaxError if marker is invalid. This implementation uses the 'pyparsing' module. 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