Reading an Excel file
There are many ways to deal with Excel files as well.
pip install openpyxl
import openpyxl
import sys
if len(sys.argv) !=2:
exit(f"Usage: {sys.argv[0]} FILENAME")
in_file = sys.argv[1]
wb = openpyxl.load_workbook(filename = in_file)
for ws in wb.worksheets:
print(ws.title)
ws = wb.worksheets[0]
print(ws['A1'].value)