Raymond Hettinger <rhettin...@users.sourceforge.net> added the comment:
I cannot reproduce your final example:
Python 2.7a0 (trunk, Aug 4 2009, 12:07:15)
>>> from collections import OrderedDict
[41375 refs]
>>> if (OrderedDict() != None):
... print 'okie'
... else:
... print 'gah'
...
okie
Both are based on OrderedDict.__eq__ defined as:
def __eq__(self, other):
'''od.__eq__(y) <==> od==y. Comparison to another OD is
order-sensitive
while comparison to a regular mapping is order-insensitive.
'''
if isinstance(other, OrderedDict):
return len(self)==len(other) and \
all(p==q for p, q in zip(self.items(), other.items()))
return dict.__eq__(self, other)
Other questions about your bug report.
* When you refer to odict, do you mean OrderedDict()?
* Do you understand that NotImplemented only does its magic
in the context of the == or != operator, and it bypassed
which you write dict.__eq__ or OrderedDict.__eq__?
* Are you clear that bool(NotImplemented) always evaluates to True?
Python 3.1.1 (r311:74483, Aug 17 2009, 17:02:12) [MSC v.1500 32 bit
(Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> from collections import OrderedDict
>>> if (OrderedDict() != None):
... print('Okie')
... else:
... print('Gah')
Okie
Okie
----------
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue6737>
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