title: python, default parameters/arguments for builtin open?
body: <p>Right, simple question here. I couldn't find an answer using google and looking here.</p>
  
  <p>I need to write a few stubs for builtin functions within python like <code>open(name[, mode[, buffering]])</code>. However I can't seem to find the default values for <code>mode</code> and <code>buffering</code><br>
  It does not seem to be <code>None</code></p>