from typing import TYPE_CHECKING, Any
from langchain._api import create_importer
if TYPE_CHECKING:
from langchain_community.vectorstores.utils import (
DistanceStrategy,
filter_complex_metadata,
maximal_marginal_relevance,
)
# Create a way to dynamically look up deprecated imports.
# Used to consolidate logic for raising deprecation warnings and
# handling optional imports.
DEPRECATED_LOOKUP = {
"DistanceStrategy": "langchain_community.vectorstores.utils",
"maximal_marginal_relevance": "langchain_community.vectorstores.utils",
"filter_complex_metadata": "langchain_community.vectorstores.utils",
}
_import_attribute = create_importer(__package__, deprecated_lookups=DEPRECATED_LOOKUP)
def __getattr__(name: str) -> Any:
"""Look up attributes dynamically."""
return _import_attribute(name)
__all__ = [
"DistanceStrategy",
"maximal_marginal_relevance",
"filter_complex_metadata",
]