Count duplicates in column and add them to new col Pandas

This video explains
Count duplicates in column and add them to new col Pandas

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Music by Eric Matyas
https://www.soundimage.org

Track title: Flying Over Ancient Lands

Full question
https://stackoverflow.com/questions/6610...

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

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Chapters
00:00 Question
01:03 Accepted answer
01:20 Answer 2
01:50 Answer 3
02:16 Thank you

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Tags
#python #pandas