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Training State

Modules have a training: bool property that specifies whether the module is in training mode or not. This property conditions the behavior of Modules such as Dropout and BatchNorm, which behave differently between training and evaluation.

# training loop
for step in range(1000):
    loss, model, opt_state = train_step(model, x, y, opt_state)

# prepare for evaluation
model = model.eval()

# make predictions
preds = model(X_test)

To switch between modes, use the .train() and .eval() methods, they return a new Module whose training state and the state of all of its submodules (recursively) are set to the desired value.