paddlenlp.transformers.layoutlmv2.tokenizer 源代码

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# Copyright 2018 The Google AI Language Team Authors and The HuggingFace Inc. team.
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#     http://www.apache.org/licenses/LICENSE-2.0
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""" Tokenization classes for LayoutLMv2 model."""

from ..bert.tokenizer import BertTokenizer

__all__ = ["LayoutLMv2Tokenizer"]

PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES = {
    "layoutlmv2-base-uncased": 512,
    "layoutlmv2-large-uncased": 512,
    "layoutlmv2-wo-backbone-base-uncased": 512,
}


class LayoutLMv2Tokenizer(BertTokenizer):
    """
    The usage of LayoutLMv2Tokenizer is the same as
    `BertTokenizer <https://paddlenlp.readthedocs.io/zh/latest/source/paddlenlp.transformers.bert.tokenizer.html>`__.
    For more information regarding those methods, please refer to this superclass.
    """

    resource_files_names = {"vocab_file": "vocab.txt"}  # for save_pretrained
    pretrained_resource_files_map = {
        "vocab_file": {
            "layoutlmv2-base-uncased": "https://bj.bcebos.com/paddlenlp/models/transformers/layoutlmv2/layoutlmv2-base-uncased/vocab.txt",
            "layoutlmv2-large-uncased": "https://bj.bcebos.com/paddlenlp/models/transformers/layoutlmv2/layoutlmv2-large-uncased/vocab.txt",
            "layoutlmv2-wo-backbone-base-uncased": "https://bj.bcebos.com/paddlenlp/models/transformers/layoutlmv2/layoutlmv2-base-uncased/vocab.txt",
        }
    }
    pretrained_init_configuration = {
        "layoutlmv2-base-uncased": {"do_lower_case": True},
        "layoutlmv2-large-uncased": {"do_lower_case": True},
        "layoutlmv2-wo-backbone-base-uncased": {"do_lower_case": True},
    }

    max_model_input_sizes = PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES