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 len(sys.argv) == 1:
   print('no arguments passed')
   sys.exit()

This will check if any arguments were passed at all. If there are no arguments, it will exit the script, without running the rest of it.