human
Can you provide a the Python code you requested given the following:
I am working on the file "Korepanova/Korepanova_theanets.ipynb".
The first task is:
Custom Regularizers
To create a custom regularizer in theanets, you need to create a custom subclass of the theanets.Regularizer class, and then provide this regularizer when you run your model.
Example:
Can you write Python code for it?
assistant
#Here is the Python code you requested.

class WeightInverse(theanets.Regularizer):
    def loss(self, layers, outputs):
        return sum((1 / (p * p).sum(axis=0)).sum()
                   for l in layers for p in l.params
                   if p.ndim == 2)

net = theanets.Autoencoder([4, (8, 'linear'), (4, 'tied')])
net.train(..., weightinverse=0.001)