df make index a column code example
Example 1: set index to column pandas
df = df.set_index('col')
df['col'] = df.index
Example 2: pandas create a column from index
df.reset_index(level=0, inplace=True)
df = df.set_index('col')
df['col'] = df.index
df.reset_index(level=0, inplace=True)