title: Python: Clicking a button with urllib or urllib2
body: <p>I want to click a button with python, the info for the form is automatically filled by the webpage. the HTML code for sending a request to the button is:</p>
  
  <pre><code>INPUT type="submit" value="Place a Bid"&gt;
  </code></pre>
  
  <p>How would I go about doing this?
  Is it possible to click the button with just urllib or urllib2? Or will I need to use something like mechanize or twill?</p>