title: Can I add sections to optparse.OptionParser in python?
body: <p>I want to add an Examples section after Options when user calls <code>prog -h</code> in python.</p>
  
  <p>I have searched the <a href="http://docs.python.org/2/library/optparse.html" rel="nofollow">optparse.OptionParser</a> documents and the Internet in general and have found no help.</p>
  
  <p>What <code>copy-task-branch -h</code> currently outputs:</p>
  
  <pre><code>Usage
  =====
    copy-task-branch [options] source destination
  Options
  =======
  -h, --help              show this help message and exit
  -f, --force             Force rewrite of existing branches.
  -r REVISION, --revision=REVISION
                          Use specific codeline revision (will not override using @ on source).
  </code></pre>
  
  <p>What I want (or something close):</p>
  
  <pre><code>Usage
  =====
    copy-task-branch [options] source destination
  Options
  =======
  -h, --help              show this help message and exit
  -f, --force             Force rewrite of existing branches.
  -r REVISION, --revision=REVISION
                          Use specific codeline revision (will not override using @ on source).
  Examples
  ========
    copy-task-branch stable/next stable/topic1
  </code></pre>
  
  <p>Is something like this possible?</p>