__init__.py 文件源码

def import_submodules(package, recursive=True):
    """Import all submodules of a module, recursively, including subpackages

    :param package: package (name or actual module)
    :type package: str | module
    :rtype: dict[str, types.ModuleType]
    """
    if isinstance(package, str):
        package = importlib.import_module(package)
    for loader, name, is_pkg in pkgutil.walk_packages(
            package.__path__, package.__name__ + '.'):
        if TEST_DIR in name:
            continue
        imported = importlib.import_module(name)
        for prop in getattr(imported, "TRAITS", []):
            symbolize(name, prop)
        if recursive and is_pkg:
            import_submodules(name)


# This is where the names defined in submodules are imported