KeyError：“无法打开属性（无法定位属性：'nb_layers'）”

我有一个Python代码，使用Keras。我没有发布代码，因为代码有点长，而且问题似乎与代码本身无关。

这是我遇到的错误：

File "h5py\h5a.pyx", line 77, in h5py.h5a.open (D:\Build\h5py\h5py-2.7.0\h5py\h5a.c:2350)
KeyError: "Can't open attribute (Can't locate attribute: 'nb_layers')"

可能是什么问题？和Keras有关系吗？我该如何解决这个问题？

EDIT 1

该错误似乎与这部分代码有关：

# load VGG16 weights
    f = h5py.File(weights_path)

    for k in range(f.attrs['nb_layers']):
        if k >= len(model.layers):
            break
        g = f['layer_{}'.format(k)]
        weights = [g['param_{}'.format(p)] for p in range(g.attrs['nb_params'])]
        model.layers[k].set_weights(weights)

    f.close()
    print('Model loaded.')

Thanks.

使用权重文件 vgg16_weights_th_dim_ordering_th_kernels.h5https://github.com/fchollet/deep-learning-models/releases https://github.com/fchollet/deep-learning-models/releases

该文件采用 Keras 2 格式。