title: Can I pass on options from optparse to argparse?
body: <p>I am wrapping a class that exposes its <a href="https://docs.python.org/2/library/optparse.html#optparse.OptionParser" rel="nofollow"><code>OptionParser</code></a> through a property named <code>options_parser</code>. I am wrapping this class in a 'runner' that I've written to use <a href="https://docs.python.org/2/library/argparse.html#module-argparse" rel="nofollow">argparse</a>. I use the <code>ArgumentParser</code>'s <a href="https://docs.python.org/2/library/argparse.html#argparse.ArgumentParser.parse_known_args" rel="nofollow"><code>parse_known_args()</code></a> method to parse the wrapper's argument, and any of the remaining arguments I pass on to the instance of the wrapped class.</p>
  
  <p>Running <code>./wrapper.py --help</code> does not list the options from the wrapped class. Is there a convenient way to add the optparse options to the wrapper's argparse argument?</p>