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freeCodeCamp/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-duplicates.md
miyaliu666 3ea2fe4f77 feat(i18n,curriculum): add Bilibili ids for Chinese (#43564) 
Co-authored-by: Kristofer Koishigawa <scissorsneedfoodtoo@gmail.com>
Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
2021-10-01 09:54:12 +05:30

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id, title, challengeType, videoId, bilibiliIds, dashedName
id title challengeType videoId bilibiliIds dashedName
5e9a093a74c4063ca6f7c15f Data Cleaning Duplicates 11 kj7QqjXhH6A
aid bvid cid
675611672 BV1VU4y1A7tu 409019368
data-cleaning-duplicates

--description--

Instead of using notebooks.ai like it shows in the video, you can use Google Colab instead.

More resources:

--question--

--text--

The Python method .duplicated() returns a boolean Series for your DataFrame. True is the return value for rows that:

--answers--

contain a duplicate, where the value for the row contains the first occurrence of that value.

contain a duplicate, where the value for the row is at least the second occurrence of that value.

contain a duplicate, where the value for the row contains either the first or second occurrence.

--video-solution--

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