Documentation / Implementation difference in Autoencoder

Created by: Maddosaurus

While exploring the AutoEncoder in pyod, I've noticed a discrepancy between the generated docs and the implementation.
While the docs (https://pyod.readthedocs.io/en/latest/pyod.models.html#module-pyod.models.auto_encoder) inform you, that hidden_neurons defaults to a list ([64, 32, 32, 64]), the implementation assigns None as type: https://github.com/yzhao062/pyod/blob/development/pyod/models/auto_encoder.py#L126
Whilst this isn't a problem for itself, instancing an AutoEncoder like that resulted in a TypeError on my side:

         # Verify the network design is valid
>       if not self.hidden_neurons == self.hidden_neurons[::-1]:
E       TypeError: 'NoneType' object is not subscriptable

It might be worth a try to change the default for hidden_neurons to the list mentioned in the docs.
And by the way: Thanks for this framework, it is really a breeze to work with!