How can I get optparse's OptionParser to ignore invalid options?

Question

In python\'s OptionParser, how can I instruct it to ignore

Answer 1

This is pass_through.py example from Optik distribution.

#!/usr/bin/env python

# "Pass-through" option parsing -- an OptionParser that ignores
# unknown options and lets them pile up in the leftover argument
# list.  Useful for programs that pass unknown options through
# to a sub-program.

from optparse import OptionParser, BadOptionError

class PassThroughOptionParser(OptionParser):

    def _process_long_opt(self, rargs, values):
        try:
            OptionParser._process_long_opt(self, rargs, values)
        except BadOptionError, err:
            self.largs.append(err.opt_str)

    def _process_short_opts(self, rargs, values):
        try:
            OptionParser._process_short_opts(self, rargs, values)
        except BadOptionError, err:
            self.largs.append(err.opt_str)


def main():
    parser = PassThroughOptionParser()
    parser.add_option("-a", help="some option")
    parser.add_option("-b", help="some other option")
    parser.add_option("--other", action='store_true',
                      help="long option that takes no arg")
    parser.add_option("--value",
                      help="long option that takes an arg")
    (options, args) = parser.parse_args()
    print "options:", options
    print "args:", args

main()