optimum/quanto/models/diffusers_models.py [127:137]:
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        if os.path.isdir(pretrained_model_name_or_path):
            working_dir = pretrained_model_name_or_path
        else:
            working_dir = snapshot_download(pretrained_model_name_or_path, **kwargs)

        # Look for a quantization map
        qmap_path = os.path.join(working_dir, cls._qmap_name())
        if not os.path.exists(qmap_path):
            raise ValueError(
                f"No quantization map found in {pretrained_model_name_or_path}: is this a quantized model ?"
            )
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optimum/quanto/models/transformers_models.py [124:134]:
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        if os.path.isdir(pretrained_model_name_or_path):
            working_dir = pretrained_model_name_or_path
        else:
            working_dir = snapshot_download(pretrained_model_name_or_path, **kwargs)

        # Look for a quantization map
        qmap_path = os.path.join(working_dir, cls._qmap_name())
        if not os.path.exists(qmap_path):
            raise ValueError(
                f"No quantization map found in {pretrained_model_name_or_path}: is this a quantized model ?"
            )
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