As this require py3 and also there is no update to bias, please do some pull request.

[kwccoin]

A very clear example except there is no update to bias. Highly suggest to update that. As said by many others, it is very useful.

[kimmanlui]

HI Here is a version of bias updated based on mattm/simple-neural-network for reference
https://github.com/kimmanlui/Examples/blob/master/SimpleNN-Backbackpropagation.ipynb

[priyadesh99]

I have created a pull request for this!