empchat/datasets/empchat.py [95:101]:
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                try:
                    from pytorch_pretrained_bert import BertTokenizer
                except ImportError:
                    raise Exception(
                        "BERT rankers needs pytorch-pretrained-BERT installed. "
                        "\npip install pytorch-pretrained-bert"
                    )
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empchat/datasets/loader.py [49:55]:
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    try:
        from pytorch_pretrained_bert import BertTokenizer
    except ImportError:
        raise Exception(
            "BERT rankers needs pytorch-pretrained-BERT installed. "
            "\npip install pytorch-pretrained-bert"
        )
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