Small neural network library in pure Python and numpy.

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PyGrad

Neural network library written in Python completely from scratch, using only numpy.

Usage

import nn

a = nn.Tensor(1), b = nn.Tensor(2)
c = a.mul(b)
c.backward()

print(a.grad, b.grad) # should output (2, 1)

This is free and unencumbered software released into the public domain.