[Tutor] Testing for commandline args
William O'Higgins
william.ohiggins at utoronto.ca
Sat May 14 02:30:56 CEST 2005
I am writing a tiny commandline utility (re-writing it from Perl) and I
want the behaviour to change based on the presence of arguments. The
conditional in Perl looks like this:
if (defined $ARGV[0]) {
do stuff
} else {
do different stuff
In Python I've nearly been successful, but something's wonky. Here's
the code:
if sys.argv[1]:
do stuff
else:
do different stuff
If I have arguments, the "different stuff" happens beautifully, thank
you very much. If I don't have arguments I get this:
if sys.argv[1]:
IndexError: list index out of range]
So I'm doing something wrong. I looked at getopt, but that seemed to be
doing what I was already doing, except in a way I could not follow :-(
Any tips would be appreciated, thanks.
--
yours,
William
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