very wonderous loop behavior: lists changes identity. What is happening?

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Chapters
00:00 Question
01:03 Accepted answer (Score 6)
01:42 Answer 2 (Score 2)
02:10 Answer 3 (Score 0)
02:36 Thank you

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Full question
https://stackoverflow.com/questions/3512...

Answer 1 links:
[docs]: https://docs.python.org/2/library/functi...

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Tags
#python #loops #forloop #scope

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