How to make a slice of DataFrame and "fillna" in specific slice using Python Pandas?

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Chapters
00:00 Question
00:50 Accepted answer (Score 6)
02:04 Answer 2 (Score 2)
02:55 Answer 3 (Score 1)
04:09 Thank you

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Full question
https://stackoverflow.com/questions/4745...

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https://meta.stackexchange.com/help/lice...

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Tags
#python #pandas #dataframe #dataanalysis

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