len(sys.argv) in (3,4)

[Daniel Dittmar]

Daniel Schüle wrote:
> if __name__ == "__main__":
>     if len(sys.argv) not in (3,4):
>         print "usage: prog arg1 argv2 [-x]"
>     # etc ...
> 
> while develeoping I had my interpeter running and reloaded module
> now since I am ready, I wanted to run it from cmd windows shell
> but it always prints "usage ..."
> I added print len(sys.arg) and it prints 1 though I am provinding more
> than 1 value

Add

import sys
print sys.argv

at the top of the script before any other import.
Maybe one of the modules you're importing messes with sys.argv

Daniel