title: REPL - recover callable after redefining it
body: <p>I doing some work inside the Python REPL and I redefined one of the primitive callable's.</p>
  
  <p>i.e <code>list = []</code>
  will prevent <code>tuple = list((1,2,3))</code> from working anymore.</p>
  
  <p>Aside from restarting the REPL is there a way to 'recover' or reassign list to its default value? </p>
  
  <p><em>Maybe there is an import or a super class? Or would it be forever lost and stuck with what I assigned it until I restart the REPL?</em></p>