'Reshape executors.
Parameters
data_shapes : list
label_shapes : list'

def reshape(self, data_shapes, label_shapes):

    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)
