<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def reshape(self, data_shapes, label_shapes):
 """Reshape executors. Parameters data_shapes : list label_shapes : list """

        if data_shapes == self.data_shapes and label_shapes == self.label_shapes:
            return
        if self._default_execs is None:
            self._default_execs = [i for i in self.execs]
        self.bind_exec(data_shapes, label_shapes, reshape=True)