Paradoxical behaviour of math.nan when combined with the 'in' operator

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Music by Eric Matyas
https://www.soundimage.org
Track title: Dreaming in Puzzles

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Chapters
00:00 Question
01:58 Accepted answer (Score 7)
03:27 Answer 2 (Score 1)
03:52 Thank you

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Full question
https://stackoverflow.com/questions/4880...

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Tags
#python

#avk47