57 lines
838 B
Markdown
57 lines
838 B
Markdown
|
---
|
||
|
id: 5e9a093a74c4063ca6f7c15d
|
||
|
challengeType: 11
|
||
|
videoId: ovYNhnltVxY
|
||
|
---
|
||
|
|
||
|
## 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: |
|
||
|
What will the following code print out?
|
||
|
|
||
|
```py
|
||
|
import pandas as pd
|
||
|
import numpy as np
|
||
|
|
||
|
s = pd.Series(['a', 3, np.nan, 1, np.nan])
|
||
|
|
||
|
print(s.notnull().sum())
|
||
|
```
|
||
|
|
||
|
answers:
|
||
|
- |
|
||
|
3
|
||
|
- |
|
||
|
```
|
||
|
0 True
|
||
|
1 True
|
||
|
2 False
|
||
|
3 True
|
||
|
4 False
|
||
|
dtype: bool
|
||
|
```
|
||
|
- |
|
||
|
```
|
||
|
0 False
|
||
|
1 False
|
||
|
2 True
|
||
|
3 False
|
||
|
4 True
|
||
|
dtype: bool
|
||
|
```
|
||
|
solution: 1
|
||
|
````
|
||
|
|
||
|
</section>
|