133     def __getitem__(self, key):  argument
142     def __delitem__(self, key):  argument
152     def __contains__(self, key):  argument
164     def __setitem__(self, key, value):  argument
194     def get(self, key, default=None):  argument
261     def pop(self, key, *args):  argument
276     def setdefault(self, key, default=None):  argument
347     def __new__(type, ob, callback, key):  argument
352     def __init__(self, ob, callback, key):  argument
410     def __delitem__(self, key):  argument
414     def __getitem__(self, key):  argument
427     def __setitem__(self, key, value):  argument
451     def get(self, key, default=None):  argument
454     def __contains__(self, key):  argument
503     def pop(self, key, *args):  argument
507     def setdefault(self, key, default=None):  argument