2020-04-21 12:42:19 -04:00
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---
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id: 5e9a093a74c4063ca6f7c15f
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title: Data Cleaning Duplicates
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challengeType: 11
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2020-06-23 17:36:39 +05:30
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isHidden: false
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2020-04-21 12:42:19 -04:00
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videoId: kj7QqjXhH6A
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---
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## Description
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<section id='description'>
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2020-07-17 05:12:45 -04:00
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More resources:
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- <a href="https://notebooks.ai/rmotr-curriculum/data-cleaning-rmotr-freecodecamp-fd76fa59" target='_blank'>Notebook</a>
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2020-04-21 12:42:19 -04:00
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</section>
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## Tests
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<section id='tests'>
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```yml
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question:
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2020-05-28 22:40:36 +09:00
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text: |
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The Python method `.duplicated()` returns a boolean Series for your DataFrame. `True` is the return value for rows that:
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2020-04-21 12:42:19 -04:00
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answers:
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2020-05-10 00:16:11 -05:00
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- contain a duplicate, where the value for the row contains the first occurrence of that value.
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- contain a duplicate, where the value for the row is at least the second occurrence of that value.
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- contain a duplicate, where the value for the row contains either the first or second occurrence.
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solution: 2
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2020-04-21 12:42:19 -04:00
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```
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</section>
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