Checking operator attrgetter in replaced __dict__

Python 2.7.3 (default, Aug  1 2012, 05:16:07)
[GCC 4.6.3] on linux2
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==== No Subprocess ====
>>> class A(object):
    def __init__(self, **kwargs):
        self.__dict__= kwargs


>>> class B(object):
    def __init__(self, **kwargs):
        self.__dict__.update(kwargs)


>>> a=[A(code=1), A(code=2)]
>>> b=[B(code=1), B(code=2)]
>>> import operator
>>> a.sort(key=operator.attrgetter("code"))
>>> b.sort(key=operator.attrgetter("code"))
>>>