model.py

import torch
from safetensors.torch import load_file

def load_model(path='model.safetensors'):
    return load_file(path)

def exactly2of3(a, b, c, weights):
    """Returns 1 if exactly 2 of 3 inputs are high"""
    inp = torch.tensor([float(a), float(b), float(c)])
    l1 = (inp @ weights['layer1.weight'].T + weights['layer1.bias'] >= 0).float()
    out = (l1 @ weights['layer2.weight'].T + weights['layer2.bias'] >= 0).float()
    return int(out.item())

if __name__ == '__main__':
    w = load_model()
    print('exactly2outof3 truth table:')
    for i in range(8):
        a, b, c = (i >> 2) & 1, (i >> 1) & 1, i & 1
        print(f'  {a}{b}{c} -> {exactly2of3(a, b, c, w)}')