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46 lines
1.4 KiB
46 lines
1.4 KiB
1 month ago
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#!/usr/bin/env python3
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import numpy as np
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from PIL import Image
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from tinygrad.nn.state import get_parameters
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from tinygrad.nn import optim
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from tinygrad.helpers import getenv
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from extra.training import train, evaluate
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from extra.models.resnet import ResNet
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from extra.datasets import fetch_mnist
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class ComposeTransforms:
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def __init__(self, trans):
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self.trans = trans
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def __call__(self, x):
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for t in self.trans:
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x = t(x)
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return x
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if __name__ == "__main__":
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X_train, Y_train, X_test, Y_test = fetch_mnist()
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X_train = X_train.reshape(-1, 28, 28).astype(np.uint8)
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X_test = X_test.reshape(-1, 28, 28).astype(np.uint8)
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classes = 10
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TRANSFER = getenv('TRANSFER')
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model = ResNet(getenv('NUM', 18), num_classes=classes)
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if TRANSFER:
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model.load_from_pretrained()
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lr = 5e-3
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transform = ComposeTransforms([
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lambda x: [Image.fromarray(xx, mode='L').resize((64, 64)) for xx in x],
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lambda x: np.stack([np.asarray(xx) for xx in x], 0),
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lambda x: x / 255.0,
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lambda x: np.tile(np.expand_dims(x, 1), (1, 3, 1, 1)).astype(np.float32),
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])
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for _ in range(5):
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optimizer = optim.SGD(get_parameters(model), lr=lr, momentum=0.9)
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train(model, X_train, Y_train, optimizer, 100, BS=32, transform=transform)
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evaluate(model, X_test, Y_test, num_classes=classes, transform=transform)
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lr /= 1.2
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print(f'reducing lr to {lr:.7f}')
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