def __setitem__(self, key, value):
    ' Set a key which will not be stored and evaluated traditionally. '
    self._dic[key] = value
    if (key in self._lazyload):
        del self._lazyload[key]
Set a key which will not be stored and evaluated traditionally.
def __setitem__(self, key, value):
    '  '
    self._dic[key] = value
    if (key in self._lazyload):
        del self._lazyload[key]