add an index column pandas

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Isabel
26 Sep 2019
1df.reset_index(level=0, inplace=True)
source
Lili
08 Oct 2016
1df = df.set_index('col')
Abril
10 Jan 2019
1import numpy as np
2import pandas as pd
3df = pd.DataFrame({'month': [2, 5, 8, 10],
4                   'year': [2017, 2019, 2018, 2019],
5                   'sale': [60, 45, 90, 36]})
6df.set_index('month')
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