how to set index pandas
# assignment copy
df = df.set_index('month')
# or inplace
df.set_index('month', inplace=True)
# year sale month month year sale
# 0 2012 55 1 1 2012 55
# 1 2014 40 4 => 4 2014 40
# 2 2013 84 7 7 2013 84
# 3 2014 31 10 10 2014 31set index to column pandas
df = df.set_index('col')
df['col'] = df.indexchange index to dataframe pandas
#cree un indice par defaut sur la base de donnee
df.reset_index()dataframe change index
>>> df.set_index('month')
year sale
month
1 2012 55
4 2014 40
7 2013 84
10 2014 31Copyright © 2021 Codeinu
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