args

#!/usr/bin/env python3

import sys

if len(sys.argv) == 3:
    try:
        rows = int(sys.argv[1])
        columns = int(sys.argv[2])
    except ValueError:
        print("error: arguments have to be integers")
        sys.exit(1)

    if 1 <= rows <= 9 and 1 <= columns <= 9:
        for r in range(rows):
            for c in range(columns):
                print(" * ", end='')
            print()
    else:
        print("error: arguments have to be 1..9")
        #sys.exit(1)
else:
    print("error: need 2 arguments")
    #sys.exit(1)