gistfile1.py

class ResultAttr:
    attr_names = set((
            '_ResultAttr__value', '_ResultAttr__result', 'name'))

    def __init__(self, name, value, result):
        """
        Proxy class for `Result` attributes

        Arguments:
        - `name`: attribute name, for example 'user'
        - `value`: actual value
        - `result`: `Result` instance
        """
        self.__name = name
        self.__value = value
        self.__result = result

    def __getattr__(self, name):
        if hasattr(self.__value, name):
            return getattr(self.__value, name)
        else:
            return getattr(
                self.__result,
                '%s%s%s' % (self.__name, DOTATTR_SEPARATOR, name))

    def __call__(self):
        return self

    def __cmp__(self, other):
        return cmp(self.__value, self.__value.__class__(other))