if A vs if A is not None:

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Music by Eric Matyas
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Track title: Isolated

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Chapters
00:00 Question
00:25 Accepted answer (Score 212)
01:33 Answer 2 (Score 81)
02:05 Answer 3 (Score 55)
02:22 Answer 4 (Score 20)
04:17 Thank you

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Full question
https://stackoverflow.com/questions/7816...

Accepted answer links:
[Special method names]: http://docs.python.org/reference/datamod...

Answer 2 links:
[PEP8]: http://www.python.org/dev/peps/pep-0008/

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Tags
#python

#avk47