How to overcome TypeError: unhashable type: 'list'

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Chapters
00:00 Question
00:57 Accepted answer (Score 80)
02:12 Answer 2 (Score 79)
03:42 Answer 3 (Score 28)
04:12 Answer 4 (Score 6)
05:46 Thank you

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Full question
https://stackoverflow.com/questions/1367...

Answer 3 links:
[setdefault()]: https://docs.python.org/3/library/stdtyp...

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Tags
#python #list #dictionary #typeerror

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