Method fileno

src/urllib3/response.py:1310–1319

(self)

            return True

    def fileno(self) -> int:
        if self._fp is None:
            raise OSError("HTTPResponse has no file to get a fileno from")
        elif hasattr(self._fp, "fileno"):
            return self._fp.fileno()
        else:
            raise OSError(
                "The file-like object this HTTPResponse is wrapped "
                "around has no file descriptor"
            )

    def flush(self) -> None:
        if (