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- # YOLOv5 🚀 by Ultralytics, GPL-3.0 license
- """
- Callback utils
- """
- class Callbacks:
- """"
- Handles all registered callbacks for YOLOv5 Hooks
- """
- # Define the available callbacks
- _callbacks = {
- 'on_pretrain_routine_start': [],
- 'on_pretrain_routine_end': [],
- 'on_train_start': [],
- 'on_train_epoch_start': [],
- 'on_train_batch_start': [],
- 'optimizer_step': [],
- 'on_before_zero_grad': [],
- 'on_train_batch_end': [],
- 'on_train_epoch_end': [],
- 'on_val_start': [],
- 'on_val_batch_start': [],
- 'on_val_image_end': [],
- 'on_val_batch_end': [],
- 'on_val_end': [],
- 'on_fit_epoch_end': [], # fit = train + val
- 'on_model_save': [],
- 'on_train_end': [],
- 'teardown': [],
- }
- def register_action(self, hook, name='', callback=None):
- """
- Register a new action to a callback hook
- Args:
- hook The callback hook name to register the action to
- name The name of the action for later reference
- callback The callback to fire
- """
- assert hook in self._callbacks, f"hook '{hook}' not found in callbacks {self._callbacks}"
- assert callable(callback), f"callback '{callback}' is not callable"
- self._callbacks[hook].append({'name': name, 'callback': callback})
- def get_registered_actions(self, hook=None):
- """"
- Returns all the registered actions by callback hook
- Args:
- hook The name of the hook to check, defaults to all
- """
- if hook:
- return self._callbacks[hook]
- else:
- return self._callbacks
- def run(self, hook, *args, **kwargs):
- """
- Loop through the registered actions and fire all callbacks
- Args:
- hook The name of the hook to check, defaults to all
- args Arguments to receive from YOLOv5
- kwargs Keyword Arguments to receive from YOLOv5
- """
- assert hook in self._callbacks, f"hook '{hook}' not found in callbacks {self._callbacks}"
- for logger in self._callbacks[hook]:
- logger['callback'](*args, **kwargs)
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