langchain/vectorstores/annoy.py/dependable_annoy_import
def dependable_annoy_import() -> Any:
    """Import annoy if available, otherwise raise error."""
    try:
        import annoy
    except ImportError:
        raise ValueError(
            "Could not import annoy python package. "
            "Please install it with `pip install --user annoy` "
        )
    return annoy