json_bnf = """
object 
    { members } 
    {} 
members 
    string : value 
    members , string : value 
array 
    [ elements ]
    [] 
elements 
    value 
    elements , value 
value 
    string
    number
    object
    array
    true
    false
    null
"""

from pyparsing import *

TRUE = Keyword("true")
FALSE = Keyword("false")
NULL = Keyword("null")

jsonString = dblQuotedString.setParseAction( removeQuotes )
jsonNumber = Combine( Optional('-') + ( '0' | Word('123456789',nums) ) +
                    Optional( '.' + Word(nums) ) +
                    Optional( Word('eE',exact=1) + Word(nums+'+-',nums) ) )

jsonObject = Forward()
jsonValue = Forward()
jsonElements = delimitedList( jsonValue )
jsonArray = Group( Suppress('[') + jsonElements + Suppress(']') )
jsonValue << ( jsonString | jsonNumber | jsonObject  | jsonArray | TRUE | FALSE | NULL )
memberDef = Group( jsonString + Suppress(':') + jsonValue )
jsonMembers = delimitedList( memberDef )
jsonObject << Dict( Suppress('{') + jsonMembers + Suppress('}') )

jsonComment = cppStyleComment 
jsonObject.ignore( jsonComment )

TRUE.setParseAction( replaceWith(True) )
FALSE.setParseAction( replaceWith(False) )
NULL.setParseAction( replaceWith(None) )

jsonString.setParseAction( removeQuotes )

def convertNumbers(s,l,toks):
    n = toks[0]
    try:
        return int(n)
    except ValueError, ve:
        return float(n)
        
jsonNumber.setParseAction( convertNumbers )
    
testdata = """
{
    "glossary": {
        "title": "example glossary",
        "GlossDiv": {
            "title": "S",
            "GlossList": 
                [{
                "ID": "SGML",
                "SortAs": "SGML",
                "GlossTerm": "Standard Generalized Markup Language",
                "TrueValue": true,
                "FalseValue": false,
                "Gravity": -9.8,
                "LargestPrimeLessThan100": 97,
                "AvogadroNumber": 6.02E23,
                "EvenPrimesGreaterThan2": null,
                "Acronym": "SGML",
                "Abbrev": "ISO 8879:1986",
                "GlossDef": "A meta-markup language, used to create markup languages such as DocBook.",
                "GlossSeeAlso": ["GML", "XML", "markup"]
                }]
        }
    }
}
"""

import pprint
results = jsonObject.parseString(testdata)
pprint.pprint( results.asList() )
print
def testPrint(x):
    print type(x),x
print results.glossary.GlossDiv.GlossList.keys()
testPrint( results.glossary.title )
testPrint( results.glossary.GlossDiv.GlossList.ID )
testPrint( results.glossary.GlossDiv.GlossList.FalseValue )
testPrint( results.glossary.GlossDiv.GlossList.Acronym )