If you need to process command line arguments then the argparse module
may also be useful to you. More info can be found here:
http://docs.python.org/library/argparse.html
Regards
Peter Lavelle
On 16/06/11 19:03, Steve Willoughby wrote:
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).
--
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