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) < 2:
    print "You must set argument!!!"

Answer 2

for arg in sys.argv:
    print (arg)  
    #print cli arguments

You can use it to store the argument in list and used them. Is more safe way than to used them like this sys.argv[n]

No problems if no arguments are given