Counting rows since condition

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Music by Eric Matyas
https://www.soundimage.org
Track title: Lost Civilization

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Chapters
00:00 Question
00:30 Accepted answer (Score 6)
00:43 Answer 2 (Score 1)
01:11 Thank you

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Full question
https://stackoverflow.com/questions/4604...

Answer 1 links:
[image]: https://i.stack.imgur.com/afiYD.jpg

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Tags
#python #pandas #boolean #cumsum

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