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# Configuration

基类[`PretrainedConfig`]实现了从本地文件或目录加载/保存配置的常见方法，或下载库提供的预训练模型配置（从HuggingFace的AWS S3库中下载）。

每个派生的配置类都实现了特定于模型的属性。所有配置类中共同存在的属性有：`hidden_size`、`num_attention_heads` 和 `num_hidden_layers`。文本模型进一步添加了 `vocab_size`。


## PretrainedConfig

[[autodoc]] PretrainedConfig
    - push_to_hub
    - all