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In this case the config has to be initialized from two or more configs of type [`~transformers.PretrainedConfig`] like: [`~transformers.EncoderDecoderConfig`] or [`~RagConfig`]. - **keys_to_ignore_at_inference** (`List[str]`) -- A list of keys to ignore by default when looking at dictionary outputs of the model during inference. - **attribute_map** (`Dict[str, str]`) -- A dict that maps model specific attribute names to the standardized naming of attributes. - **base_model_tp_plan** (`Dict[str, Any]`) -- A dict that maps sub-modules FQNs of a base model to a tensor parallel plan applied to the sub-module when `model.tensor_parallel` is called. Common attributes (present in all subclasses): - **vocab_size** (`int`) -- The number of tokens in the vocabulary, which is also the first dimension of the embeddings matrix (this attribute may be missing for models that don't have a text modality like ViT). - **hidden_size** (`int`) -- The hidden size of the model. - **num_attention_heads** (`int`) -- The number of attention heads used in the multi-head attention layers of the model. - **num_hidden_layers** (`int`) -- The number of blocks in the model. <Tip warning={true}> Setting parameters for sequence generation in the model config is deprecated. For backward compatibility, loading some of them will still be possible, but attempting to overwrite them will throw an exception -- you should set them in a [~transformers.GenerationConfig]. Check the documentation of [~transformers.GenerationConfig] for more information about the individual parameters. </Tip> Arg: name_or_path (`str`, *optional*, defaults to `""`): Store the string that was passed to [`PreTrainedModel.from_pretrained`] or [`TFPreTrainedModel.from_pretrained`] as `pretrained_model_name_or_path` if the configuration was created with such a method. output_hidden_states (`bool`, *optional*, defaults to `False`): Whether or not the model should return all hidden-states. output_attentions (`bool`, *optional*, defaults to `False`): Whether or not the model should returns all attentions. return_dict (`bool`, *optional*, defaults to `True`): Whether or not the model should return a [`~transformers.utils.ModelOutput`] instead of a plain tuple. is_encoder_decoder (`bool`, *optional*, defaults to `False`): Whether the model is used as an encoder/decoder or not. is_decoder (`bool`, *optional*, defaults to `False`): Whether the model is used as decoder or not (in which case it's used as an encoder). cross_attention_hidden_size** (`bool`, *optional*): The hidden size of the cross-attention layer in case the model is used as a decoder in an encoder-decoder setting and the cross-attention hidden dimension differs from `self.config.hidden_size`. add_cross_attention (`bool`, *optional*, defaults to `False`): Whether cross-attention layers should be added to the model. Note, this option is only relevant for models that can be used as decoder models within the [`EncoderDecoderModel`] class, which consists of all models in `AUTO_MODELS_FOR_CAUSAL_LM`. tie_encoder_decoder (`bool`, *optional*, defaults to `False`): Whether all encoder weights should be tied to their equivalent decoder weights. This requires the encoder and decoder model to have the exact same parameter names. prune_heads (`Dict[int, List[int]]`, *optional*, defaults to `{}`): Pruned heads of the model. The keys are the selected layer indices and the associated values, the list of heads to prune in said layer. For instance `{1: [0, 2], 2: [2, 3]}` will prune heads 0 and 2 on layer 1 and heads 2 and 3 on layer 2. chunk_size_feed_forward (`int`, *optional*, defaults to `0`): The chunk size of all feed forward layers in the residual attention blocks. A chunk size of `0` means that the feed forward layer is not chunked. A chunk size of n means that the feed forward layer processes `n` < sequence_length embeddings at a time. For more information on feed forward chunking, see [How does Feed Forward Chunking work?](../glossary.html#feed-forward-chunking). > Parameters for fine-tuning tasks architectures (`List[str]`, *optional*): Model architectures that can be used with the model pretrained weights. finetuning_task (`str`, *optional*): Name of the task used to fine-tune the model. This can be used when converting from an original (TensorFlow or PyTorch) checkpoint. id2label (`Dict[int, str]`, *optional*): A map from index (for instance prediction index, or target index) to label. label2id (`Dict[str, int]`, *optional*): A map from label to index for the model. num_labels (`int`, *optional*): Number of labels to use in the last layer added to the model, typically for a classification task. task_specific_params (`Dict[str, Any]`, *optional*): Additional keyword arguments to store for the current task. problem_type (`str`, *optional*): Problem type for `XxxForSequenceClassification` models. Can be one of `"regression"`, `"single_label_classification"` or `"multi_label_classification"`. > Parameters linked to the tokenizer tokenizer_class (`str`, *optional*): The name of the associated tokenizer class to use (if none is set, will use the tokenizer associated to the model by default). prefix (`str`, *optional*): A specific prompt that should be added at the beginning of each text before calling the model. bos_token_id (`int`, *optional*): The id of the _beginning-of-stream_ token. pad_token_id (`int`, *optional*): The id of the _padding_ token. eos_token_id (`int`, *optional*): The id of the _end-of-stream_ token. decoder_start_token_id (`int`, *optional*): If an encoder-decoder model starts decoding with a different token than _bos_, the id of that token. sep_token_id (`int`, *optional*): The id of the _separation_ token. > PyTorch specific parameters torchscript (`bool`, *optional*, defaults to `False`): Whether or not the model should be used with Torchscript. tie_word_embeddings (`bool`, *optional*, defaults to `True`): Whether the model's input and output word embeddings should be tied. 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Args: pretrained_model_name_or_path (`str` or `os.PathLike`): This can be either: - a string, the *model id* of a pretrained model configuration hosted inside a model repo on huggingface.co. - a path to a *directory* containing a configuration file saved using the [`~PretrainedConfig.save_pretrained`] method, e.g., `./my_model_directory/`. - a path or url to a saved configuration JSON *file*, e.g., `./my_model_directory/configuration.json`. cache_dir (`str` or `os.PathLike`, *optional*): Path to a directory in which a downloaded pretrained model configuration should be cached if the standard cache should not be used. force_download (`bool`, *optional*, defaults to `False`): Whether or not to force to (re-)download the configuration files and override the cached versions if they exist. resume_download: Deprecated and ignored. All downloads are now resumed by default when possible. Will be removed in v5 of Transformers. proxies (`Dict[str, str]`, *optional*): A dictionary of proxy servers to use by protocol or endpoint, e.g., `{'http': 'foo.bar:3128', 'http://hostname': 'foo.bar:4012'}.` The proxies are used on each request. token (`str` or `bool`, *optional*): The token to use as HTTP bearer authorization for remote files. If `True`, or not specified, will use the token generated when running `huggingface-cli login` (stored in `~/.huggingface`). revision (`str`, *optional*, defaults to `"main"`): The specific model version to use. It can be a branch name, a tag name, or a commit id, since we use a git-based system for storing models and other artifacts on huggingface.co, so `revision` can be any identifier allowed by git. <Tip> To test a pull request you made on the Hub, you can pass `revision="refs/pr/<pr_number>"`. </Tip> return_unused_kwargs (`bool`, *optional*, defaults to `False`): If `False`, then this function returns just the final configuration object. If `True`, then this functions returns a `Tuple(config, unused_kwargs)` where *unused_kwargs* is a dictionary consisting of the key/value pairs whose keys are not configuration attributes: i.e., the part of `kwargs` which has not been used to update `config` and is otherwise ignored. subfolder (`str`, *optional*, defaults to `""`): In case the relevant files are located inside a subfolder of the model repo on huggingface.co, you can specify the folder name here. kwargs (`Dict[str, Any]`, *optional*): The values in kwargs of any keys which are configuration attributes will be used to override the loaded values. Behavior concerning key/value pairs whose keys are *not* configuration attributes is controlled by the `return_unused_kwargs` keyword parameter. Returns: [`PretrainedConfig`]: The configuration object instantiated from this pretrained model. 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