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12/11/2024 09:39:44 AM
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0README.html
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AcManForm.dfm
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LAparser.py
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Setup.ini
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SimpleCalc.py
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SingleForm.dfm
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TAP.py
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__init__.py
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adventureEngine.py
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antlr_grammar.py
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antlr_grammar_tests.py
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apicheck.py
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bf.py
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bigquery_view_parser.py
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booleansearchparser.py
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btpyparse.py
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builtin_parse_action_demo.py
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cLibHeader.py
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chemical_formulas.py
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commasep.py
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configParse.py
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cpp_enum_parser.py
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cuneiform_python.py
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datetime_parse_actions.py
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decaf_parser.py
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delta_time.py
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dfmparse.py
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dhcpd_leases_parser.py
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dictExample.py
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dictExample2.py
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directx_x_file_parser.py
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ebnf.py
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ebnftest.py
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email_address_parser.py
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eval_arith.py
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excel_expr.py
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fourFn.py
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gen_ctypes.py
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getNTPserversNew.py
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greeting.py
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greetingInGreek.py
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greetingInKorean.py
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groupUsingListAllMatches.py
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hola_mundo.py
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html_stripper.py
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html_table_parser.py
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httpServerLogParser.py
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idlParse.py
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include_preprocessor.py
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indentedGrammarExample.py
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indented_block_example.py
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inv_regex.py
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javascript_grammar.g
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jsonParser.py
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left_recursion.py
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lineno_example.py
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listAllMatches.py
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lua_parser.py
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lucene_grammar.py
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macro_expander.py
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make_diagram.py
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matchPreviousDemo.py
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mongodb_query_expression.py
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mozilla.ics
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mozillaCalendarParser.py
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nested.py
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nested_markup.py
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number_words.py
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numerics.py
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oc.py
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one_to_ninety_nine.py
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parseTabularData.py
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parse_python_value.py
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parse_results_sum_example.py
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partial_gene_match.py
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pgn.py
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position.py
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protobuf_parser.py
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pythonGrammarParser.py
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railroad_diagram_demo.py
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range_check.py
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readJson.py
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removeLineBreaks.py
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roman_numerals.py
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rosettacode.py
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scanExamples.py
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searchParserAppDemo.py
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searchparser.py
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select_parser.py
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sexpParser.py
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shapes.py
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simpleArith.py
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simpleBool.py
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simpleSQL.py
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simpleWiki.py
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snmp_api.h
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sql2dot.py
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stackish.py
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statemachine
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tag_emitter.py
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tag_metadata.py
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test_bibparse.py
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unicode_denormalizer.py
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urlExtractor.py
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urlExtractorNew.py
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verilog_parse.py
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withAttribute.py
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wordsToNum.py
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Editing: sexpParser.py
Close
# sexpParser.py # # Demonstration of the pyparsing module, implementing a simple S-expression # parser. # # Updates: # November, 2011 - fixed errors in precedence of alternatives in simpleString; # fixed exception raised in verifyLen to properly signal the input string # and exception location so that markInputline works correctly; fixed # definition of decimal to accept a single '0' and optional leading '-' # sign; updated tests to improve parser coverage # # Copyright 2007-2011, by Paul McGuire # """ BNF reference: http://theory.lcs.mit.edu/~rivest/sexp.txt <sexp> :: <string> | <list> <string> :: <display>? <simple-string> ; <simple-string> :: <raw> | <token> | <base-64> | <hexadecimal> | <quoted-string> ; <display> :: "[" <simple-string> "]" ; <raw> :: <decimal> ":" <bytes> ; <decimal> :: <decimal-digit>+ ; -- decimal numbers should have no unnecessary leading zeros <bytes> -- any string of bytes, of the indicated length <token> :: <tokenchar>+ ; <base-64> :: <decimal>? "|" ( <base-64-char> | <whitespace> )* "|" ; <hexadecimal> :: "#" ( <hex-digit> | <white-space> )* "#" ; <quoted-string> :: <decimal>? <quoted-string-body> <quoted-string-body> :: "\"" <bytes> "\"" <list> :: "(" ( <sexp> | <whitespace> )* ")" ; <whitespace> :: <whitespace-char>* ; <token-char> :: <alpha> | <decimal-digit> | <simple-punc> ; <alpha> :: <upper-case> | <lower-case> | <digit> ; <lower-case> :: "a" | ... | "z" ; <upper-case> :: "A" | ... | "Z" ; <decimal-digit> :: "0" | ... | "9" ; <hex-digit> :: <decimal-digit> | "A" | ... | "F" | "a" | ... | "f" ; <simple-punc> :: "-" | "." | "/" | "_" | ":" | "*" | "+" | "=" ; <whitespace-char> :: " " | "\t" | "\r" | "\n" ; <base-64-char> :: <alpha> | <decimal-digit> | "+" | "/" | "=" ; <null> :: "" ; """ import pyparsing as pp from base64 import b64decode def verify_length(s, l, t): t = t[0] if t.len is not None: t1len = len(t[1]) if t1len != t.len: raise pp.ParseFatalException( s, l, "invalid data of length {}, expected {}".format(t1len, t.len) ) return t[1] # define punctuation literals LPAR, RPAR, LBRK, RBRK, LBRC, RBRC, VBAR, COLON = ( pp.Suppress(c).setName(c) for c in "()[]{}|:" ) decimal = pp.Regex(r"-?0|[1-9]\d*").setParseAction(lambda t: int(t[0])) hexadecimal = ("#" + pp.Word(pp.hexnums)[1, ...] + "#").setParseAction( lambda t: int("".join(t[1:-1]), 16) ) bytes = pp.Word(pp.printables) raw = pp.Group(decimal("len") + COLON + bytes).setParseAction(verify_length) base64_ = pp.Group( pp.Optional(decimal | hexadecimal, default=None)("len") + VBAR + pp.Word(pp.alphanums + "+/=")[1, ...].setParseAction( lambda t: b64decode("".join(t)) ) + VBAR ).setParseAction(verify_length) real = pp.Regex(r"[+-]?\d+\.\d*([eE][+-]?\d+)?").setParseAction( lambda tokens: float(tokens[0]) ) token = pp.Word(pp.alphanums + "-./_:*+=!<>") qString = pp.Group( pp.Optional(decimal, default=None)("len") + pp.dblQuotedString.setParseAction(pp.removeQuotes) ).setParseAction(verify_length) simpleString = real | base64_ | raw | decimal | token | hexadecimal | qString display = LBRK + simpleString + RBRK string_ = pp.Optional(display) + simpleString sexp = pp.Forward() sexpList = pp.Group(LPAR + sexp[...] + RPAR) sexp <<= string_ | sexpList def main(): # Test data test00 = """(snicker "abc" (#03# |YWJj|))""" test01 = """(certificate (issuer (name (public-key rsa-with-md5 (e 15 |NFGq/E3wh9f4rJIQVXhS|) (n |d738/4ghP9rFZ0gAIYZ5q9y6iskDJwASi5rEQpEQq8ZyMZeIZzIAR2I5iGE=|)) aid-committee)) (subject (ref (public-key rsa-with-md5 (e |NFGq/E3wh9f4rJIQVXhS|) (n |d738/4ghP9rFZ0gAIYZ5q9y6iskDJwASi5rEQpEQq8ZyMZeIZzIAR2I5iGE=|)) tom mother)) (not-before "1997-01-01_09:00:00") (not-after "1998-01-01_09:00:00") (tag (spend (account "12345678") (* numeric range "1" "1000")))) """ test02 = """(lambda (x) (* x x))""" test03 = """(def length (lambda (x) (cond ((not x) 0) ( t (+ 1 (length (cdr x)))) ) ) ) """ test04 = """(2:XX "abc" (#03# |YWJj|))""" test05 = """(if (is (window_name) "XMMS") (set_workspace 2))""" test06 = """(if (and (is (application_name) "Firefox") (or (contains (window_name) "Enter name of file to save to") (contains (window_name) "Save As") (contains (window_name) "Save Image") () ) ) (geometry "+140+122") ) """ test07 = """(defun factorial (x) (if (zerop x) 1 (* x (factorial (- x 1))))) """ test51 = """(2:XX "abc" (#03# |YWJj|))""" test51error = """(3:XX "abc" (#03# |YWJj|))""" test52 = """ (and (or (> uid 1000) (!= gid 20) ) (> quota 5.0e+03) ) """ # Run tests local_vars = sorted(locals().items()) alltests = [ test_fn for testname, test_fn in local_vars if testname.startswith("test") ] sexp.runTests(alltests, fullDump=False) if __name__ == "__main__": main()