Problem with for loop

[Blue Dog]

Hi I found out how the email scraper with this in the opening line "sys.argv[1]"
work it works just fine like I had it. I was running it wrong.
In kali I try to run it like this root# python email_grabber.py then I hit enter.
I got the error you see on the post. The way it should be ran is this way:
root#python email_grabber.py http://website_address.com It run well like that.
working on two more now.