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freeCodeCamp/curriculum/challenges/portuguese/08-data-analysis-with-python/data-analysis-with-python-course/data-cleaning-with-dataframes.md
2022-06-27 19:25:35 +05:30

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---
id: 5e9a093a74c4063ca6f7c15e
title: Limpar os dados com DataFrames
challengeType: 11
videoId: sTMN_pdI6S0
bilibiliIds:
aid: 505597026
bvid: BV1Yg411c7bx
cid: 409018948
dashedName: data-cleaning-with-dataframes
---
# --description--
*Ao invés de usar notebooks.ai como foi mostrado no vídeo, você pode usar o Google Colab como substituto.*
Mais recursos:
- <a href="https://github.com/ine-rmotr-curriculum/data-cleaning-rmotr-freecodecamp" target="_blank" rel="noopener noreferrer nofollow">Notebooks no GitHub</a>
- <a href="https://colab.research.google.com/github/googlecolab/colabtools/blob/master/notebooks/colab-github-demo.ipynb" target="_blank" rel="noopener noreferrer nofollow">Como abrir notebooks do GitHub usando o Google Colab.</a>
# --question--
## --text--
O que será impresso pelo código a seguir?
```py
import pandas as pd
import numpy as np
s = pd.Series([np.nan, 1, 2, np.nan, 3])
s = s.fillna(method='ffill')
print(s)
```
## --answers--
<pre>
0 1.0
1 1.0
2 2.0
3 3.0
4 3.0
dtype: float64
</pre>
---
<pre>
0 NaN
1 1.0
2 2.0
3 2.0
4 3.0
dtype: float64
</pre>
---
<pre>
0 NaN
1 1.0
2 2.0
3 NaN
4 3.0
dtype: float64
</pre>
## --video-solution--
2