dictWrap.py

class dictWrap(object):
    def __init__(self, dictIn = False, fnXform = False):
        self.noneVal = None
        if dictIn:
            if fnXform:
                dictIn = dict((k,fnXform(v)) for k,v in dictIn.items())
            self.__dict__.update(dictIn)
    def __getattribute__(self, attr):
        try:
            return object.__getattribute__(self, attr)
        except:
            return self.noneVal

myDict = {'a': 'apple', 'b': 'banana'}

myObj1 = dictWrap(myDict)
myObj2 = dictWrap(myDict, lambda x: str(x).upper())

if True:
    print "%r"%myDict['a']
    print "%r"%myObj1.a
    print "%r"%myObj2.a

    try:
        print "%r"%myDict['balloon']
    except Exception as e:
        print "error: %r"%e

    try:
        print "%r"%myObj2.balloon
    except Exception as e:
        print "error: %r"%e

    print "%r"%myDict.get('balloon')