title: Python Falcon Framework: optional URI parameters
body: <p>Is there a way to define <em>optional</em> path parameters in the Falcon web framework? Currently, I'm declaring separate routes for modifying the same resource.</p>
  
  <pre><code>app.add_route('/users/', users_api_post)
  app.add_route('/users/{id}', users_api_put)
  </code></pre>
  
  <p>PS: There's a similar <a href="https://stackoverflow.com/questions/14032066/flask-optional-url-parameters">question</a> on SO for Flask framework.</p>