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) 

But how could I test if the argument has been entered in the command line call? I need to do something like this:

if isset(sys.argv[1]):     foo(sys.argv[1]) else:     print "You must set argument!!!" 

Answer 1

len(sys.argv) > 1