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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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