---
id: 5e9a093a74c4063ca6f7c15f
title: Data Cleaning Duplicates
challengeType: 11
isHidden: false
videoId: kj7QqjXhH6A
---

## Description

<section id='description'>
More resources:
- <a href="https://notebooks.ai/rmotr-curriculum/data-cleaning-rmotr-freecodecamp-fd76fa59" target='_blank'>Notebook</a>
</section>

## Tests

<section id='tests'>

```yml
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.
  solution: 2
```

</section>