this is my model:
def __init__(self, features, num_classes=8, init_weights=True):
    super(VGG, self).__init__()
    self.features = features
    self.roiNum = 6
    self.roi_pool = _RoIPooling(5,5,1.0/32.0)
    self.rois_classifiers =   []
    classifier = nn.Sequential(
        nn.Linear(512 * 5 * 5, 512),
        nn.ReLU(True),
        nn.Dropout(),
        nn.Linear(512, 512),
        nn.ReLU(True),
        nn.Dropout(),
        nn.Linear(512, num_classes),
    ).cuda()
    for i in range(self.roiNum):
      self.rois_classifiers.append(copy.deepcopy(classifier))

    if init_weights:
      self._initialize_weights()

when i saved the model, it only saves  self.feautures and self.roi_pool parameters. self.rois_classifiers parameters are not saved. Also when i print the model, again it just printed features and roi_pool layers, not rois_classifier layers. However, when i print model.rois_classifiers, everything is fine.
What is the problem here?