Python

# method A
df = df.set_index('col')
# method B
df['col'] = df.index

How to convert index of a pandas dataframe into a column
df = df.reset_index(level=0)
df['index1'] = df.index

#Python 3
#Declare list of index
#and just assign it to the existing dataframe

separate_list = [1,2,3,4,5]
df.index = separate_list

index = [1,2]
df.index = index

#cree un indice par defaut sur la base de donnee
df.reset_index()

>>> df.set_index('month')
       year  sale
month
1      2012    55
4      2014    40
7      2013    84
10     2014    31

Pandas dataframe set-index

Pandas dataframe set-index()

Pandas dataframe set-index

Pandas dataframe set-index

Pandas dataframe set-index

x.index = index_values

Pandas dataframe set-index()

Pandas dataframe set-index()

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