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# Source code for langchain_community.cross_encoders.fake

    from difflib import SequenceMatcher
    from typing import List, Tuple

    from langchain_core.pydantic_v1 import BaseModel

    from langchain_community.cross_encoders.base import BaseCrossEncoder

    class FakeCrossEncoder(BaseCrossEncoder, BaseModel):
        """Fake cross encoder model."""

        def score(self, text_pairs: List[Tuple[str, str]]) -> List[float]:
            scores = list(
                map(
                    lambda pair: SequenceMatcher(None, pair[0], pair[1]).ratio(), text_pairs
                )
            )
            return scores