To avoid the exception in the discard method, it could be implemented as:
def discard(self, element):
"""Remove an element from a set if it is a member.
If the element is not a member, do nothing.
"""
try:
self._data.pop(element, None)
except TypeError:
transform = getattr(element, "__as_temporarily_immutable__", None)
if transform is None:
raise # re-raise the TypeError exception we caught
del self._data[transform()]
Currently, it's implemented as the much clearer:
try:
self.remove(element)
except KeyError:
pass
But the dict.pop method is about 12 times faster. Is this worth doing?
--
Andrew McNamara, Senior Developer, Object Craft
http://www.object-craft.com.au/
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