Method __getitem__

python/python3/tornado/httputil.py:215–216

(self, name: str)

        self._as_list[norm_name] = [value]

    def __getitem__(self, name: str) -> str:
        return self._dict[_normalize_header(name)]

    def __delitem__(self, name: str) -> None:
        norm_name = _normalize_header(name)