ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
711 B
711 B
id, challengeType, videoId, dashedName
| id | challengeType | videoId | dashedName |
|---|---|---|---|
| 5e9a093a74c4063ca6f7c15e | 11 | sTMN_pdI6S0 | data-cleaning-with-dataframes |
--description--
More resources:
- Notebook
--question--
--text--
What will the following code print out?
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--
0 1.0
1 1.0
2 2.0
3 3.0
4 3.0
dtype: float64
0 NaN
1 1.0
2 2.0
3 2.0
4 3.0
dtype: float64
0 NaN
1 1.0
2 2.0
3 NaN
4 3.0
dtype: float64
--video-solution--
2