[Python-bugs-list] [ python-Bugs-478536 ] TypeError from WeakKeyDictionary.has_key

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Bugs item #478536, was opened at 2001-11-05 19:27
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Category: Python Library
Group: Python 2.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Sverker Nilsson (svenil)
>Assigned to: Fred L. Drake, Jr. (fdrake)
Summary: TypeError from WeakKeyDictionary.has_key

Initial Comment:
TypeError from WeakKeyDictionary.has_key

The has_key method on WeakKeyDictionary
gives a TypeError if the key is not weakly
referencable. The result I expected was 0.

I can put an exception catcher around the
call, but I think the right place for that
catcher is in the has_key method.

Sverker Nilsson

Example:

Python 2.2b1 (#5, Oct 20 2001, 03:03:53) 
[GCC 2.95.2 20000220 (Debian GNU/Linux)] on linux2
Type "help", "copyright", "credits" or "license" for
more information.
>>> import weakref
>>> ref = weakref.WeakKeyDictionary()
>>> ref.has_key('asdf')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.2/weakref.py", line 182,
in has_key
    return self.data.has_key(ref(key))
TypeError: 'str' objects are not weakly referencable
>>> 


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