Thank you. I already did, it’s in the GitHub repository here: https://github.com/OmarAflak/Medium-Python-Neural-Network/blob/master/conv_layer.py

Although that might be a bit complicated to understand without explanations. Take a look at this Medium for the math: https://medium.com/@2017csm1006/forward-and-backpropagation-in-convolutional-neural-network-4dfa96d7b37e