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#!/usr/bin/env python
__author__ = "Peter Maxwell"
__copyright__ = "Copyright 2007-2009, The Cogent Project"
__credits__ = ["Peter Maxwell"]
__license__ = "GPL"
__version__ = "1.4.1"
__maintainer__ = "Peter Maxwell"
__email__ = "pm67nz@gmail.com"
__status__ = "Production"
class ImmutableDictionary(dict):
def _immutable(self, *args, **kw):
raise TypeError("%ss are immutable" % type(self).__name__)
__setitem__ = __delitem__ = _immutable
update = clear = pop = popitem = setdefault = _immutable
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