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referencable (weakref.ref() raises TypeError), return 0 instead of
propogating the TypeError.
This closes SF bug #478536; bugfix candidate.
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It still needs to be here to preserve the API.
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depending on the cycle detector code in the library implementation.
This is a *slightly* different patch than SF patch #417795, but takes
the same approach. (This version avoids calling the __len__() method of
the dict in the remove() functions.)
This closes SF patch #417795.
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This closes SF bug #458860.
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for keys that are not in the dictionary.
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Weak*Dictionary.update(): No longer create a temporary list to hold the
things that will be stuffed into the underlying dictionary. This had
been done so that if any of the objects used as the weakly-held value
was not weakly-referencable, no updates would take place (TypeError
would be raised). With this change, TypeError will still be raised
but a partial update could occur. This is more like other .update()
implementations.
Thoughout, use of the name "ref" as a local variable has been removed. The
original use of the name occurred when the function to create a weak
reference was called "new"; the overloaded use of the name could be
confusing for someone reading the code. "ref" used as a variable name
has been replaced with "wr" (for 'weak reference').
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parameter.
Weak*Dictionary.get(): Make the second parameter optional.
WeakKeyDictionary.has_key(), .keys(): Make these actually work!
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giving it a slight facelift
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WeakValueDictionary.copy(),
WeakKeyDictionary.copy(): Actually return the copy!
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dead references.
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