It's from [the Python standard library](https://pypi.python.org/pypi/argparse/1.2.1).  The license is the "Python Software Foundation License".  It's bundled with the python distribution in Python 2.7+.  It handles parsing command line arguments.  If you would rather it not be included, I can see if I can write some compatibility code using optparse instead, which is deprecated since 2.7, but bundled with 2.3-2.6.  Shall I do that?