On 16-Jun-11 10:10, Lisi wrote:
1 from sys import argv
2
3 script, user_name = argv
I have tried every permutation of white space I could think of that might have
looked like the original, but I always get the same error:
That will work ONLY if argv has at least 2 values in it. Your source
code is ok as far as it goes. Try running your script with two command
line arguments and see what you get. (The first argument should be the
name of your script, incidentally).
If your script were named foo.py, then running the command:
> foo.py
would give you the error you see because argv only has 1 thing in it and
you're trying to retrieve two. If you ran it as:
> foo.py bar
that should work, and script would be "foo.py" and user_name would be "bar".
You could check len(argv) first to see how many items you have before
you try to get two values from it.
For more sophisticated argument handling, you could look at the optparse
or argparse modules (but that's beyond the beginner level--something to
keep in mind for later).
--
Steve Willoughby / st...@alchemy.com
"A ship in harbor is safe, but that is not what ships are built for."
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