langchain/retrievers/pinecone_hybrid_search.py/PineconeHybridSearchRetriever/validate_environment
class PineconeHybridSearchRetriever:    def validate_environment(cls, values: Dict) -> Dict:
        """Validate that api key and python package exists in environment."""
        try:
            from pinecone_text.hybrid import hybrid_convex_scale  # noqa:F401
            from pinecone_text.sparse.base_sparse_encoder import (
                BaseSparseEncoder,  # noqa:F401
            )
        except ImportError:
            raise ValueError(
                "Could not import pinecone_text python package. "
                "Please install it with `pip install pinecone_text`."
            )
        return values