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73 lines
2.6 KiB
Python
73 lines
2.6 KiB
Python
3 weeks ago
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# Ultralytics YOLOv5 🚀, AGPL-3.0 license
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"""Callback utils."""
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import threading
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class Callbacks:
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"""Handles all registered callbacks for YOLOv5 Hooks."""
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def __init__(self):
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"""Initializes a Callbacks object to manage registered YOLOv5 training event hooks."""
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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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}
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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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