Fix a bug for `CallbackHandler.callback_list` (#8052)
* Fix callback_list * Add test Signed-off-by: harupy <17039389+harupy@users.noreply.github.com> * Fix test Signed-off-by: harupy <17039389+harupy@users.noreply.github.com>
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@ -325,7 +325,7 @@ class CallbackHandler(TrainerCallback):
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@property
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def callback_list(self):
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return "\n".join(self.callbacks)
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return "\n".join(cb.__class__.__name__ for cb in self.callbacks)
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def on_init_end(self, args: TrainingArguments, state: TrainerState, control: TrainerControl):
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return self.call_event("on_init_end", args, state, control)
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@ -221,3 +221,10 @@ class TrainerCallbackTest(unittest.TestCase):
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trainer.train()
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events = trainer.callback_handler.callbacks[-2].events
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self.assertEqual(events, self.get_expected_events(trainer))
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# warning should be emitted for duplicated callbacks
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with unittest.mock.patch("transformers.trainer_callback.logger.warn") as warn_mock:
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trainer = self.get_trainer(
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callbacks=[MyTestTrainerCallback, MyTestTrainerCallback],
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)
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assert str(MyTestTrainerCallback) in warn_mock.call_args[0][0]
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