serializers.py

def partially_nested(serializer, include_fields=None, exclude_fields=None):
    partial_fields = set(include_fields or []) - set(exclude_fields or [])
    serializer.opts.exclude = tuple(
        set(serializer.get_fields()) - set(partial_fields)
    )
    serializer.fields = serializer.get_fields()
    return serializer