How to check if an argument from commandline has been set?

Question

I can call my script like this:

python D:\\myscript.py 60

And in the script I can do:

arg = sys.argv[1]
foo(arg)
         


        

Answer 1

If you're using Python 2.7/3.2, use the argparse module. Otherwise, use the optparse module. The module takes care of parsing the command-line, and you can check whether the number of positional arguments matches what you expect.