how to set index dataframe code example
Example 1: set index to column pandas
df = df.set_index('col')
df['col'] = df.index
Example 2: how to change index in dataframe python
index = [1,2]
df.index = index
df = df.set_index('col')
df['col'] = df.index
index = [1,2]
df.index = index