Question

I have the below function running fine on python 2.6, but appengine’s production environment is 2.5 and it blows up on:

AttributeError: ‘module’ object has no attribute ‘Mapping’

Does anyone have a solution for 2.5?

Thanks

Chris

import types, collections

class AttrDict(dict):
    '''AttrDict - dict with JS-like key=attr access'''
    def __init__(self, *argz, **kwz):
        if len(argz) == 1 and not kwz and isinstance(argz[0], types.StringTypes):
            super(AttrDict, self).__init__(open(argz[0]))
        else:
            super(AttrDict, self).__init__(*argz, **kwz)
            for k,v in self.iteritems(): setattr(self, k, v) # re-construct all values via factory

    def __val_factory(self, val):
        return AttrDict(val) if isinstance(val, collections.Mapping) else val

    def __getattr__(self, k):
        return super(AttrDict, self).__getitem__(k)
        __getitem__ = __getattr__

    def __setattr__(self, k, v):
        return super(AttrDict, self).__setitem__(k, self.__val_factory(v))
        __setitem__ = __setattr__

Answer 1

Try to replace

isinstance(val, collections.Mapping)

with

isinstance(val, dict)