Neural network [Python]

I made a neural network without any external libraries.

It is currently programmed to classify flowers from the iris dataset. After each training round, it outputs 5 random data entries, the network's certainties, and the network's guess in the following format:
[type-0 certainty, type-1 certainty, type-2 certainty]
Guess: <the highest certainty>
Real: <the actual entry>

The network it uses has a sigmoid activation function, and has two size-5 hidden layers.

If you have any questions about the internals, just ask.

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@hg0428 if ypurs is outputting 0 or 1 then disable the logistic function.