With Python's optparse module, how do you create an option that takes a variable number of arguments?
optparse, python
Solution
I believe `optparse` does not support what you require (not directly -- as you noticed, you can do it if you're willing to do all the extra work of a callback!-). You could also do it most simply with the third-party extension argparse, which does support variable numbers of arguments (and also adds several other handy bits of functionality).
This URL documents `argparse`'s `add_argument` -- passing `nargs='*'` lets the option take zero or more arguments, `'+'` lets it take one or more arguments, etc.
Problem
With Perl's `Getopt::Long` you can easily define command-line options that take a variable number of arguments: ``` foo.pl --files a.txt --verbose foo.pl --files a.txt b.txt c.txt --verbose ``` Is there a way to do this directly with Python's `optparse` module? As far as I can tell, the `nargs` option attribute can be used to specify a fixed number of option arguments, and I have not seen other alternatives in the documentation.