Apply vs transform on a group object

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Track title: Puzzle Game 5

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Chapters
00:00 Question
01:41 Accepted answer (Score 320)
07:20 Answer 2 (Score 201)
10:35 Answer 3 (Score 18)
12:30 Answer 4 (Score 5)
12:48 Thank you

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Full question
https://stackoverflow.com/questions/2751...

Question links:
[The example on the documentation]: http://pandas.pydata.org/pandas-docs/sta...

Accepted answer links:
[image]: https://i.stack.imgur.com/8LMn5.png

Answer 2 links:
[This answer]: https://stackoverflow.com/a/13854901/407...

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Tags
#python #pandas

#avk47