Fix loading of tokenizers in DPR #2755
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julian-risch
approved these changes
Jul 4, 2022
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Related Issue(s): #2711
Proposed changes:
This PR resets the default tokenizer class for DPR from
AutoTokenizertoDPRQuestionEncoderTokenizerandDPRContextEncoderTokenizer, respectively. This is needed, as for example the spanish DPR modelIIC/dpr-spanish-passage_encoder-allqa-basesets thetokenizer_classto"DPRContextEncoderTokenizer", but this can't be loaded using theAutoTokenizer. It is missing in transformersTOKENIZER_MAPPING_NAMES, resulting in the error:Tokenizer class DPRContextEncoderTokenizer does not exist or is not currently imported.