def _serialize_multipartform()

in src/anthropic/_base_client.py [0:0]

• 16 lines of code
• 5 McCabe index (conditional complexity)

    def _serialize_multipartform(self, data: Mapping[object, object]) -> dict[str, object]:
        items = self.qs.stringify_items(
            # TODO: type ignore is required as stringify_items is well typed but we can't be
            # well typed without heavy validation.
            data,  # type: ignore
            array_format="brackets",
        )
        serialized: dict[str, object] = {}
        for key, value in items:
            existing = serialized.get(key)

            if not existing:
                serialized[key] = value
                continue

            # If a value has already been set for this key then that
            # means we're sending data like `array[]=[1, 2, 3]` and we
            # need to tell httpx that we want to send multiple values with
            # the same key which is done by using a list or a tuple.
            #
            # Note: 2d arrays should never result in the same key at both
            # levels so it's safe to assume that if the value is a list,
            # it was because we changed it to be a list.
            if is_list(existing):
                existing.append(value)
            else:
                serialized[key] = [existing, value]

        return serialized