title: python requests module - set key to null
body: <p>from the requests documentation :</p>
  <blockquote>
  <h2>Remove a Value From a Dict Parameter</h2>
  <p>Sometimes you’ll want to omit session-level keys from a dict parameter. To do this, you simply set that key’s value to None in the method-level parameter. It will automatically be omitted.</p>
  </blockquote>
  <p>I need the data with key's value as <strong>None</strong> to take the Json value <strong>null</strong> instead of being removed.
  Is it possible ?</p>
  <p>edit : This seems to happen with my request data keys. While they are not session-level the behaviour of removing is still the same.</p>