It was not obvious from the documentation on argparse how to emulate the optparse.OptionParser.allow_interspersed_args feature.

Please add something like the following to the section titled "Upgrading optparse code" (see: http://docs.python.org/library/argparse.html#upgrading-optparse-code )

"""
* If the optparse code sets allow_interspersed_args to False, then add an argparse positional argument with nargs=argparse.REMAINDER
"""