Andrés Marzal <amar...@lsi.uji.es> added the comment:
I've implemented a LinkedList as a MutableSequence and __iadd__, which
is inherited from MutableSequence, does not perform as expected.
The _abcoll.py file contains this:
class MutableSequence(Sequence):
...
def __iadd__(self, values):
self.extend(values)
The method __iadd__ does not return anything, buy it should return
self. Right now, the sentence
aLinkedList += [1, 2]
sets the value of aLinkedList to None.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue6037>
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