how to make a column index in pandas read_excel code example

Example 1: pandas read excel

import pandas as pd
pd.read_excel('tmp.xlsx', index_col=0)

Example 2: pandas read from excel

import pandas as pd
pandas.read_excel(io, sheet_name=0, header=0, names=None,
                  index_col=None, usecols=None, 
                  squeeze=False, dtype=None, engine=None, 
                  converters=None, true_values=None, 
                  false_values=None, skiprows=None, 
                  nrows=None, na_values=None, 
                  keep_default_na=True, verbose=False, 
                  parse_dates=False, date_parser=None, 
                  thousands=None, comment=None, 
                  skipfooter=0, convert_float=True, 
                  mangle_dupe_cols=True, **kwds)

# Example
pd.read_excel('tmp.xlsx', index_col=0)