python sys.argv

import sys

args = sys.argv[1:]
result=0
print(args[0])
if args[0]=="add":
    for value in args:
        if value in ("add","mul"):
            continue
        result=result+int(value)
elif args[0]=="mul":
    result=1
    for value in args:
        if value in ("add","mul"):
            continue
        result=result*int(value)

print(result)

 

실행문

python calculator.py add 10 20 30

python calculator.py mul 10 20 30