[Python-Dev] counterintuitive behavior (bug?) in Counter with += (original) (raw)

Petri Lehtinen petri at digip.org
Thu Oct 6 17:46:37 CEST 2011


Lars Buitinck wrote:

>>> from collections import Counter >>> a = Counter([1,2,3]) >>> b = a >>> a += Counter([3,4,5]) >>> a is b False

would become # snip >>> a is b True

Sounds like a good idea to me. You should open an issue in the tracker at http://bugs.python.org/.



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