container.py 文件源码

def enumerate(self, item: Any) -> Generator[Tuple[Any, Any], None, None]:
        for key, value in self.items():
            if key == item:
                yield key, value
                continue

            try:
                if item in key:
                    yield key, value
                    continue
            except TypeError:
                # key doesn't define __contains__
                pass

            if value == item:
                yield key, value
                continue

            try:
                if item in value:
                    yield key, value
                    continue
            except TypeError:
                # value doesn't define __contains__
                pass