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- #
- # configparse.py
- #
- # an example of using the parsing module to be able to process a .INI configuration file
- #
- # Copyright (c) 2003, Paul McGuire
- #
- from pyparsing import \
- Literal, Word, ZeroOrMore, Group, Dict, Optional, \
- printables, ParseException, restOfLine, empty
- import pprint
- inibnf = None
- def inifile_BNF():
- global inibnf
- if not inibnf:
- # punctuation
- lbrack = Literal("[").suppress()
- rbrack = Literal("]").suppress()
- equals = Literal("=").suppress()
- semi = Literal(";")
- comment = semi + Optional( restOfLine )
- nonrbrack = "".join( [ c for c in printables if c != "]" ] ) + " \t"
- nonequals = "".join( [ c for c in printables if c != "=" ] ) + " \t"
- sectionDef = lbrack + Word( nonrbrack ) + rbrack
- keyDef = ~lbrack + Word( nonequals ) + equals + empty + restOfLine
- # strip any leading or trailing blanks from key
- def stripKey(tokens):
- tokens[0] = tokens[0].strip()
- keyDef.setParseAction(stripKey)
- # using Dict will allow retrieval of named data fields as attributes of the parsed results
- inibnf = Dict( ZeroOrMore( Group( sectionDef + Dict( ZeroOrMore( Group( keyDef ) ) ) ) ) )
- inibnf.ignore( comment )
- return inibnf
- pp = pprint.PrettyPrinter(2)
- def test( strng ):
- print(strng)
- try:
- iniFile = open(strng)
- iniData = "".join( iniFile.readlines() )
- bnf = inifile_BNF()
- tokens = bnf.parseString( iniData )
- pp.pprint( tokens.asList() )
- except ParseException as err:
- print(err.line)
- print(" "*(err.column-1) + "^")
- print(err)
- iniFile.close()
- print()
- return tokens
- if __name__ == "__main__":
- ini = test("setup.ini")
- print("ini['Startup']['modemid'] =", ini['Startup']['modemid'])
- print("ini.Startup =", ini.Startup)
- print("ini.Startup.modemid =", ini.Startup.modemid)
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