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Fix early stopping off by 2 (min_epochs) #617

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merged 2 commits into from
Dec 9, 2019
Merged

Fix early stopping off by 2 (min_epochs) #617

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2a16f63
fix early stopping off by 2
Dec 9, 2019
e8a3a70
add min_epochs example in docs
Dec 9, 2019
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5 changes: 4 additions & 1 deletion pytorch_lightning/trainer/training_loop.py
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,9 @@
# pass in your own to override the default callback
trainer = Trainer(early_stop_callback=early_stop_callback)

# pass in min_epochs to enable the callback after min_epochs have run
trainer = Trainer(early_stop_callback=early_stop_callback, min_epochs=5)

# pass in None to disable it
trainer = Trainer(early_stop_callback=None)

Expand Down Expand Up @@ -339,7 +342,7 @@ def train(self):
self.reduce_lr_on_plateau_scheduler.step(val_loss, epoch=self.current_epoch)

# early stopping
met_min_epochs = epoch > self.min_epochs
met_min_epochs = epoch >= self.min_epochs - 1
if self.enable_early_stop and (met_min_epochs or self.fast_dev_run):
should_stop = self.early_stop_callback.on_epoch_end(epoch=epoch,
logs=self.callback_metrics)
Expand Down