Method __getitem__

scrapy/http/headers.py:70–74

(self, key: AnyStr)

        raise TypeError(f"Unsupported value type: {type(x)}")

    def __getitem__(self, key: AnyStr) -> bytes | None:
        try:
            return cast("list[bytes]", super().__getitem__(key))[-1]
        except IndexError:
            return None

    def get(self, key: AnyStr, def_val: Any = None) -> bytes | None:
        try: