def clear(self):
def _clear(node):<EOL><INDENT>if node is not None:<EOL><INDENT>_clear(node.left)<EOL>_clear(node.right)<EOL>node.free()<EOL><DEDENT><DEDENT>_clear(self._root)<EOL>self._count = <NUM_LIT:0><EOL>self._root = None<EOL>
T.clear() -> None.  Remove all items from T.