def pop(self):
if len(self.stack):      <EOL><INDENT>popped = self.stack.pop()<EOL>log.debug('<STR_LIT>', Repr(popped), Repr(self.stack))<EOL>return popped<EOL><DEDENT>else:<EOL><INDENT>log.debug('<STR_LIT>')<EOL><DEDENT>return None<EOL>
Pop the frame at the top of the stack.
@return: The popped frame, else None.
@rtype: L{Frame}