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