freeCodeCamp/curriculum/challenges/chinese/08-data-analysis-with-python/data-analysis-with-python-c.../pandas-conditional-selectio...

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---
id: 5e9a093a74c4063ca6f7c15b
challengeType: 11
videoId: BFlH0fN5xRQ
---
# --description--
More resources:
\- [Notebook](https://notebooks.ai/rmotr-curriculum/freecodecamp-intro-to-pandas-902ae59b)
# --question--
## --text--
What will the following code print out?
```py
import pandas as pd
certificates_earned = pd.DataFrame({
'Certificates': [8, 2, 5, 6],
'Time (in months)': [16, 5, 9, 12]
})
names = ['Tom', 'Kris', 'Ahmad', 'Beau']
certificates_earned.index = names
longest_streak = pd.Series([13, 11, 9, 7], index=names)
certificates_earned['Longest streak'] = longest_streak
print(certificates_earned)
```
## --answers--
```
Tom 13
Kris 11
Ahmad 9
Beau 7
Name: Longest streak, dtype: int64
```
---
```
Certificates Time (in months) Longest streak
Tom 8 16 13
Kris 2 5 11
Ahmad 5 9 9
Beau 6 12 7
```
---
```
Certificates Longest streak
Tom 8 13
Kris 2 11
Ahmad 5 9
Beau 6 7
```
## --video-solution--
2
# --hints--
# --solutions--