Method append

aiohttp/multipart.py:972–985

(self, obj: Any, headers: Mapping[str, str] | None = None)

        return self._boundary.decode("ascii")

    def append(self, obj: Any, headers: Mapping[str, str] | None = None) -> Payload:
        if headers is None:
            headers = CIMultiDict()

        if isinstance(obj, Payload):
            obj.headers.update(headers)
            return self.append_payload(obj)
        else:
            try:
                payload = get_payload(obj, headers=headers)
            except LookupError:
                raise TypeError("Cannot create payload from %r" % obj)
            else:
                return self.append_payload(payload)

    def append_payload(self, payload: Payload) -> Payload:
        """Adds a new body part to multipart writer."""