Catching Exceptions

• An example pulled from the documentation for the getopt module
• Illustrates an idiomatic way for parsing command line arguments

import getopt, sys

def main():
    try:
        opts, args = getopt.getopt(sys.argv[1:], "ho:", ["help", "output="])
    except getopt.GetoptError:
        # print help information and exit:
        usage()
        sys.exit(2)
    ...etc...

• getopt.getopt will 'raise' a getopt.GetoptError if incorrect command line arguments were specified