On 12/26/2010 11:49 AM, kj wrote:
In<mailman.302.1293387041.6505.python-l...@python.org> Ian
Kelly<ian.g.ke...@gmail.com> writes:
On 12/26/2010 10:53 AM, kj wrote:
P.S. If you uncomment the commented-out line, and comment out the
last line of the __init__ method (which installs self._delitem as
self.__delitem__) then *all* the deletion attempts invoke the
__delitem__ method, and are therefore blocked. FWIW.
Because subclasses of builtins only check the class __dict__ for special
method overrides, not the instance __dict__.
How do you know this?
From memory, although it seems I remembered it slightly wrong; it's the
way new-style classes work in general, not anything to do with builtins
in particular.
Is this documented?
Yes, as others have pointed out.
Or is this a case of Monday-night quarterbacking?
Do you mean "Monday-morning quarterbacking"? Either way, I don't know
what you mean by that in this context.
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