test_no_more_changes_to_proxy_community() — langchain Function Reference

Source Code

libs/langchain/tests/unit_tests/test_imports.py lines 78–108

def test_no_more_changes_to_proxy_community() -> None:
    """This test is meant to catch any changes to the proxy community module.

    Imports from langchain to community are officially DEPRECATED. Contributors
    should not be adding new imports from langchain to community. This test
    is meant to catch any new changes to the proxy community module.
    """
    library_code = PKG_ROOT / "langchain_classic"
    hash_ = 0
    for path in library_code.rglob("*.py"):
        # Calculate the relative path to the module
        if not str(path).endswith("__init__.py"):
            continue

        deprecated_lookup = extract_deprecated_lookup(str(path))
        if deprecated_lookup is None:
            continue

        # This uses a very simple hash, so it's not foolproof, but it should catch
        # most cases.
        hash_ += len(str(sorted(deprecated_lookup.items())))

    evil_magic_number = 38644

    assert hash_ == evil_magic_number, (
        "If you're triggering this test, you're likely adding a new import "
        "to the langchain package that is importing something from "
        "langchain_community. This test is meant to catch such such imports "
        "as they are officially DEPRECATED. Please do not add any new imports "
        "from langchain_community to the langchain package. "
    )