Why does using `arg=None` fix Python's mutable default argument issue?

This video explains
Why does using `arg=None` fix Python's mutable default argument issue?

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Music by Eric Matyas
https://www.soundimage.org
Track title: Over Ancient Waters Looping

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Chapters
00:00 Question
01:17 Accepted answer (Score 21)
02:39 Answer 2 (Score 31)
05:55 Answer 3 (Score 17)
06:32 Answer 4 (Score 4)
06:58 Thank you

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Full question
https://stackoverflow.com/questions/1067...

Question links:
[the Mutable Default Argument problem]: https://stackoverflow.com/questions/1132...

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Content licensed under CC BY-SA
https://meta.stackexchange.com/help/lice...

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Tags
#python #function #arguments #mutable

#avk47