These scrips are updated ones from the neuralnetworksanddeeplearning.com gitHub repository in order to fully work with latest Pyethon distribution.
The testing file (test.py) contains all three networks (network.py, network2.py, network3.py) from the book and it is the starting point to run (i.e. train and evaluate) them.
Just type at shell: python3.5 test.py