Éric Araujo <mer...@netwok.org> added the comment:

Using a set is actually needed: list membership testing does not use hashes 
(but probably equality), whereas set and dict membership tests does uses hashes.

(I wrote a class with an __hash__ method that prints something when called, and 
“test() in []” does not print anything, whereas “test() in set()” does.  So 
test_hash now uses a set again, and I added a comment to clarify why.)

----------
resolution: duplicate -> invalid
superseder: Get rid of doctests in packaging.tests.test_version -> 

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue13948>
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