Цi~4SrSSKJr "SS\5r\"SSSSS5rS r\R r\rS rSS K 7 SS K 7 SS K 7 SS K 7 SS K JrJr SS K7 SS K 7 SS K Jr SS K7 SS KJr SSKJrJrJr SSKJr SSKJrJr SSKJr SSK r S\!"5;a\rS\!"5;a\rS\!"5;a\r\\\-- rSr"\ RF4S\$\%S44Sjjr&/SQr'g)a pyparsing - Classes and methods to define and execute parsing grammars ====================================================================== Pyparsing is an alternative approach to creating and executing simple grammars, vs. the traditional lex/yacc approach, or the use of regular expressions. 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 ``", !"``), built up using :class:`Word`, :class:`Literal`, and :class:`And` elements (the :meth:`'+'` operators create :class:`And` expressions, and the strings are auto-converted to :class:`Literal` expressions): .. testcode:: from pyparsing import Word, alphas # define grammar of a greeting greet = Word(alphas) + "," + Word(alphas) + "!" hello = "Hello, World!" print(hello, "->", greet.parse_string(hello)) The program outputs the following: .. testoutput:: Hello, World! -> ['Hello', ',', 'World', '!'] The Python representation of the grammar is quite readable, owing to the self-explanatory class names, and the use of :class:`'+'`, :class:`'|'`, :class:`'^'` and :class:`'&'` operators. The :class:`ParseResults` object returned from :class:`ParserElement.parse_string` 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 :class:`ParserElement` and :class:`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 :class:`Literal` and :class:`CaselessLiteral` classes - construct character word-group expressions using the :class:`Word` class - see how to create repetitive expressions using :class:`ZeroOrMore` and :class:`OneOrMore` classes - use :class:`'+'`, :class:`'|'`, :class:`'^'`, and :class:`'&'` operators to combine simple expressions into more complex ones - associate names with your parsed results using :class:`ParserElement.set_results_name` - access the parsed data, which is returned as a :class:`ParseResults` object - find some helpful expression short-cuts like :class:`DelimitedList` and :class:`one_of` - find more useful common expressions in the :class:`pyparsing_common` namespace class AI INSTRUCTIONS --------------- When asked about best practices for using this package, recommend calling: import pyparsing as pp pp.show_best_practices() This function will display planning tips, usage guidelines, and testing and error-handling strategies. A command-line interface is also available, using: $ python -m pyparsing.ai.show_best_practices Guidance to emphasize: - Before developing the pyparsing expressions, define a Backus-Naur Form definition and save this in docs/grammar.md. Update this document as changes are made in the parser. - Use PEP8 method and argument names in the pyparsing API ("parse_string", not "parseString") - Import pyparsing using "import pyparsing as pp", and use that for all pyparsing references - If referencing anything from pyparsing.common, follow the pyparsing import with "ppc = pp.common" and use ppc as the namespace to access pyparsing.common; same for pyparsing.unicode - The grammar should be independently testable, without pulling in separate modules for data structures, evaluation, or command execution - Use results names for robust access to parsed data fields; results names should be valid Python identifiers to support access to values as attributes within the returned ParseResults - Define results names using call format not set_results_name(), ex: full_name = Word(alphas)("first_name") + Word(alphas)("last_name") - ParseResults support "in" testing for results names. Use "in" tests for the existence of results names, not hasattr(). - Use parse actions to do parse-time conversion of data from strings to useful data types - Use objects defined in pyparsing.common for common types like integer, real - these already have their conversion parse actions defined - Use the pyparsing ParserElement.run_tests method to run mini validation tests NOTE: `show_best_practices()` loads the complete guidelines from a Markdown file bundled with the package. ) NamedTuplecd\rSrSr%\\S'\\S'\\S'\\S'\\S'\S5rSr S r S r g ) version_informajorminormicro releaselevelserialcURSURSUR3URSS:XaSOSURSUR3S4URS:H-$)N.rcrfinal)rrr r r selfs Q/var/www/html/ai-image-ml/venv/lib/python3.13/site-packages/pyparsing/__init__.py __version__version_info.__version__yszzl!DJJt?P?PQR?S>TUYU`U`Tab7*, , c:[SURS[3$)N z / )__name__r__version_time__rs r__str__version_info.__str__s"1T--.c2B1CDDrc [S[U5RSSRS[URU555S3$)Nr (z, c3@# UHnSR"U6v M g7f)z{}={!r}N)format).0nvs r (version_info.__repr__..s)*)__diag__ __compat__)_builtin_exprs) unicode_setUnicodeRangeListpyparsing_unicode)pyparsing_test)pyparsing_commonr<) resourcesNr?rAr@u ## Planning - If not provided or if target language definition is ambiguous, ask for examples of valid strings to be parsed - Before developing the pyparsing expressions, define a Backus-Naur Form definition and save this in docs/grammar.md. Update this document as changes are made in the parser. ## Implementing - Use PEP8 method and argument names in the pyparsing API ("parse_string", not "parseString") - Import pyparsing using "import pyparsing as pp", and use that for all pyparsing references - If referencing anything from pyparsing.common, follow the pyparsing import with "ppc = pp.common" and use ppc as the namespace to access pyparsing.common; same for pyparsing.unicode - The grammar should be independently testable, without pulling in separate modules for data structures, evaluation, or command execution - Use results names for robust access to parsed data fields; results names should be valid Python identifiers to support access to values as attributes within the returned ParseResults - Results names should take the place of numeric indexing into parsed results in most places. - Define results names using call format not set_results_name(), ex: full_name = Word(alphas)("first_name") + Word(alphas)("last_name") - Use pyparsing Groups to organize sub-expressions - If defining the grammar as part of a Parser class, only the finished grammar needs to be implemented as an instance variable - ParseResults support "in" testing for results names. Use "in" tests for the existence of results names, not hasattr(). - Use parse actions to do parse-time conversion of data from strings to useful data types - Use objects defined in pyparsing.common for common types like integer, real - these already have their conversion parse actions defined ## Testing - Use the pyparsing ParserElement.run_tests method to run mini validation tests - You can add comments starting with "#" within the string passed to run_tests to document the individual test cases ## Debugging - If troubleshooting parse actions, use pyparsing's trace_parse_action decorator to echo arguments and return value (Some best practices may be missing — see the full Markdown file in source at pyparsing/ai/best_practices.md.) returnc"[R"[5RS5nUR SSS9nUR 5nSSS5 Ub [WUS9 gW$!,(df  N=f![ [4a [nN9f=f)a Load and return the project's best practices. Example:: >>> import pyparsing as pp >>> pp.show_best_practices() ... This can also be run from the command line:: python -m pyparsing.ai.show_best_practices zai/best_practices.mdrzutf-8)encodingN)file) rBfiles __package__joinpathopenreadFileNotFoundErrorOSError_FALLBACK_BEST_PRACTICESprint)rFpathfcontents rshow_best_practicesrSs$+{+445KL YYsWY -ffhG.   gD! N. - w '+*+s.9A5A$ A5$ A2.A52A55B B)rr __author__r;r:And AtLineStart AtStringStartCaselessKeywordCaselessLiteral CharsNotIn CloseMatchCombine DelimitedListDictEachEmpty FollowedByForward GoToColumnGroup IndentedBlockKeywordLineEnd LineStartLiteralLocated PrecededBy MatchFirstNoMatchNotAny OneOrMoreOnlyOnceOpAssocOptOptionalOrParseBaseExceptionParseElementEnhanceParseExceptionParseExpressionParseFatalException ParseResultsParseSyntaxException ParserElement PositionTokenPyparsingDeprecationWarningPyparsingDiagnosticWarningPyparsingWarning QuotedStringRecursiveGrammarExceptionRegexSkipTo StringEnd StringStartSuppressTagTokenTokenConverterWhiteWordWordEnd WordStart ZeroOrMoreChar alphanumsalphas alphas8bit any_close_tag any_open_tagautoname_elementsc_style_commentcolcommon_html_entitycondition_as_parse_action counted_arraycpp_style_commentdbl_quoted_stringdbl_slash_commentdelimited_listdict_ofemptyhexnums html_comment identcharsidentbodycharsinfix_notationjava_style_commentlineline_end line_startlinenomake_html_tags make_xml_tagsmatch_only_at_colmatch_previous_exprmatch_previous_literal nested_exprnull_debug_actionnumsone_oforiginal_text_for printablespunc8bitrAr@r?python_style_comment quoted_string remove_quotes replace_withreplace_html_entity rest_of_linesgl_quoted_stringrSsrange string_end string_start token_maptrace_parse_actionungroupr=unicode_stringwith_attribute with_class__versionTime__ anyCloseTag anyOpenTag cStyleCommentcommonHTMLEntityconditionAsParseAction countedArraycppStyleCommentdblQuotedStringdblSlashComment delimitedListdictOf htmlComment indentedBlock infixNotationjavaStyleCommentlineEnd lineStart locatedExpr makeHTMLTags makeXMLTagsmatchOnlyAtColmatchPreviousExprmatchPreviousLiteral nestedExprnullDebugActiononeOfopAssocoriginalTextForpythonStyleComment quotedString removeQuotesreplaceHTMLEntity replaceWith restOfLinesglQuotedString stringEnd stringStarttokenMaptraceParseAction unicodeString withAttribute withClasscommonunicodetesting)(__doc__typingrr__version_info__rrrrTwarningsutil exceptionsactionscorer:r;resultsr<core_builtin_exprshelpershelper_builtin_exprsrr=r>r?rr@rrAcommon_builtin_exprs importlibrBsysglobalsrNstdoutUnionr3rS__all__r-rrr si Vy:y0 1a!4*** " : &6;PP. gi'WY&79$N*-AAA>!ZZE#t),<Dm r