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transformers/docs/source/ja/main_classes/callback.md
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# コールバック数
コールバックは、PyTorch のトレーニング ループの動作をカスタマイズできるオブジェクトです。
トレーニング ループを検査できる [`Trainer`] (この機能は TensorFlow にはまだ実装されていません)
状態を確認し (進捗レポート、TensorBoard または他の ML プラットフォームへのログ記録など)、決定を下します (初期段階など)。
停止中)。
コールバックは、返される [`TrainerControl`] オブジェクトを除けば、「読み取り専用」のコード部分です。
トレーニング ループ内では何も変更できません。トレーニング ループの変更が必要なカスタマイズの場合は、次のことを行う必要があります。
[`Trainer`] をサブクラス化し、必要なメソッドをオーバーライドします (例については、[trainer](trainer) を参照してください)。
デフォルトでは、`TrainingArguments.report_to``"all"` に設定されているため、[`Trainer`] は次のコールバックを使用します。
- [`DefaultFlowCallback`] は、ログ記録、保存、評価のデフォルトの動作を処理します。
- [`PrinterCallback`] または [`ProgressCallback`] で進行状況を表示し、
ログ (最初のログは、[`TrainingArguments`] を通じて tqdm を非アクティブ化する場合に使用され、そうでない場合に使用されます)
2番目です)。
- [`~integrations.TensorBoardCallback`] (PyTorch >= 1.4 を介して) tensorboard にアクセスできる場合
またはテンソルボードX
- [`~integrations.WandbCallback`] [wandb](https://www.wandb.com/) がインストールされている場合。
- [`~integrations.CometCallback`] [comet_ml](https://www.comet.com/site/) がインストールされている場合。
- [mlflow](https://www.mlflow.org/) がインストールされている場合は [`~integrations.MLflowCallback`]。
- [`~integrations.AzureMLCallback`] [azureml-sdk](https://pypi.org/project/azureml-sdk/) の場合
インストールされています。
- [`~integrations.CodeCarbonCallback`] [codecarbon](https://pypi.org/project/codecarbon/) の場合
インストールされています。
- [`~integrations.ClearMLCallback`] [clearml](https://github.com/allegroai/clearml) がインストールされている場合。
- [`~integrations.DagsHubCallback`] [dagshub](https://dagshub.com/) がインストールされている場合。
- [`~integrations.FlyteCallback`] [flyte](https://flyte.org/) がインストールされている場合。
- [`~integrations.DVCLiveCallback`] [dvclive](https://www.dvc.org/doc/dvclive) がインストールされている場合。
- [`~integrations.SwanLabCallback`] [swanlab](http://swanlab.cn/) がインストールされている場合。
パッケージがインストールされているが、付随する統合を使用したくない場合は、`TrainingArguments.report_to` を、使用したい統合のみのリストに変更できます (例: `["azure_ml", "wandb"]`) 。
コールバックを実装するメインクラスは [`TrainerCallback`] です。それは、
[`TrainingArguments`] は [`Trainer`] をインスタンス化するために使用され、それにアクセスできます。
[`TrainerState`] を介してトレーナーの内部状態を取得し、トレーニング ループ上でいくつかのアクションを実行できます。
[`TrainerControl`]。
## 利用可能なコールバック
ライブラリで利用可能な [`TrainerCallback`] のリストは次のとおりです。
[[autodoc]] integrations.CometCallback
- setup
[[autodoc]] DefaultFlowCallback
[[autodoc]] PrinterCallback
[[autodoc]] ProgressCallback
[[autodoc]] EarlyStoppingCallback
[[autodoc]] integrations.TensorBoardCallback
[[autodoc]] integrations.WandbCallback
- setup
[[autodoc]] integrations.MLflowCallback
- setup
[[autodoc]] integrations.AzureMLCallback
[[autodoc]] integrations.CodeCarbonCallback
[[autodoc]] integrations.ClearMLCallback
[[autodoc]] integrations.DagsHubCallback
[[autodoc]] integrations.FlyteCallback
[[autodoc]] integrations.DVCLiveCallback
- setup
[[autodoc]] integrations.SwanLabCallback
- setup
## TrainerCallback
[[autodoc]] TrainerCallback
以下は、カスタム コールバックを PyTorch [`Trainer`] に登録する方法の例です。
```python
class MyCallback(TrainerCallback):
"A callback that prints a message at the beginning of training"
def on_train_begin(self, args, state, control, **kwargs):
print("Starting training")
trainer = Trainer(
model,
args,
train_dataset=train_dataset,
eval_dataset=eval_dataset,
callbacks=[MyCallback], # We can either pass the callback class this way or an instance of it (MyCallback())
)
```
コールバックを登録する別の方法は、次のように `trainer.add_callback()` を呼び出すことです。
```python
trainer = Trainer(...)
trainer.add_callback(MyCallback)
# Alternatively, we can pass an instance of the callback class
trainer.add_callback(MyCallback())
```
## TrainerState
[[autodoc]] TrainerState
## TrainerControl
[[autodoc]] TrainerControl