get user's follows and fans

gistfile1.py

def build_user_FOO(foo, serializer_class_name, query_param=None):
    if foo not in ['follows', 'fans', 'order_set']:
        raise AttributeError

    ##todo check SerializerClass
    get_class = lambda x: globals()[x]

    @api_view(["GET"])
    @authentication_classes((TokenAuthentication, ))
    def get_user_foo(request, pk):
        ### get user B
        user = get_object_or_404(UserProfile, pk=pk)
        #get user B's foo
        foo_manage = getattr(user, foo)
        ##q used for query condition
        q = query_param and Q(**query_param) or None
        if q:
            queryset = foo_manage.filter(q)
        else:
            queryset = foo_manage.filter()

        paginator = Paginator(queryset, 10)
        page = request.QUERY_PARAMS.get('page')
        try:
            users = paginator.page(page)
        except PageNotAnInteger:
            # If page is not an integer, deliver first page.
            users = paginator.page(1)
        except EmptyPage:
            # If page is out of range (e.g. 9999),
            # deliver last page of results.
            users = paginator.page(paginator.num_pages)
        serializer_context = {'request': request}

        serializer_class = get_class(serializer_class_name)
        serializer = serializer_class(users, context=serializer_context)
        return Response(serializer.data)

    return get_user_foo


get_user_follows = build_user_FOO('follows', 'PaginatedUserSerializer')
get_user_fans = build_user_FOO('fans', "PaginatedUserSerializer")