Using argparse in conjunction with sys.argv in Python

Question

I currently have a script, which uses file globbing via the sys.argv variable like this:

if len(sys.argv) > 1:
        for filename in sys.argv[1:]:

This works great for processing a bunch of files; however, I would like to use this with the argparse module as well. So, I would like my program to be able to handle something like the following:

foo@bar:~$ myScript.py --filter=xyz *.avi

Has anyone tried to do this, or have some pointers on how to proceed?