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December 14, 2020 05:40
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TensorFlow Tutrial
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import tensorflow as tf | |
import time | |
# from tensorflow.python.compiler.mlcompute import mlcompute | |
# mlcompute.set_mlc_device(device_name='any') | |
mnist = tf.keras.datasets.mnist | |
(x_train, y_train), (x_test, y_test) = mnist.load_data() | |
x_train, x_test = x_train / 255.0, x_test / 255.0 | |
model = tf.keras.models.Sequential([ | |
tf.keras.layers.Flatten(input_shape=(28, 28)), | |
tf.keras.layers.Dense(512, activation='relu'), | |
tf.keras.layers.Dropout(0.2), | |
tf.keras.layers.Dense(10) | |
]) | |
predictions = model(x_train[:1]).numpy() | |
loss_fn = tf.keras.losses.SparseCategoricalCrossentropy(from_logits=True) | |
model.compile(optimizer='adam', | |
loss=loss_fn, | |
metrics=['accuracy']) | |
start = time.perf_counter() | |
model.fit(x_train, y_train, epochs=5) | |
end = time.perf_counter() | |
print(f"time: {end - start:.3f}") | |
model.evaluate(x_test, y_test) |
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