<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _compute_graph_interface(self):
 """Computes self._graph_interface."""

    self._graph_interface = graph_interface.GraphInterface(self.mtf_graph)
    for mtf_output in self.mtf_outputs:
      self._graph_interface.set_tensor_final(mtf_output.name)