You can use pandas module to do so. You open a command prompt with administrator privileges and then execute this :
pip install pandas
This will download, install and add pandas to your existing python installation.
After that you can execute this code in a python file.
import pandas as pd
table = pd.read_excel('sales.xlsx',
                  sheetname = 'Month 1',
                  header = 0,
                  index_col = 0,
                  parse_cols = "A, C, G",
                  convert_float = True)
print(table)