""""

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]: