如何解决R1710要么函数中所有的返回语句都应该返回一个表达式，要么都不应该返回，？

Question

我在使用 pylint 在我的代码上，得到错误的

R1710: 一个函数中的所有返回语句要么应该返回一个表达式，要么都不应该。(不一致的返回语句)

只有两种可能的返回语句，如果我没有弄错的话，它们都返回表达式。

@api_view(["GET", "POST"])
def user_info(request):
    if request.method == 'GET':
        username = request.GET.get("username")
        password = request.GET.get("password")

        return JsonResponse(error_handle(serialize(username, password)))

    if request.method == 'POST':
        username = request.data["username"]
        password = request.data["password"]

        return JsonResponse(error_handle(serialize(username, password)))

def error_handle(serializer):
   error = serializer["error"].value
   if error > 0:
       return {"success": "false", "internal_code": error}
   return {"success": "true",
           "account_token": serializer.data["account_token"],
           "user_id": serializer.data["id"],
           "account_name": serializer.data["account_name"],
           "account_permission": serializer.data["account_permission"],
           "pin": serializer.data["pin"]
           }


def serialize(user, password):
   data = Account.objects.get(username=user, password=password)
   return AccountSerializer(data)

Answer 1

我宁愿使用APIView来代替。

from rest_framework.response import Response
from rest_framework.views import APIView

class UserInfoView(APIView):
    def get(self, request):
        username = request.query_params.get('username')
        password = request.query_params.get('password')
        return Response(error_handle(serializer(username, password))

    def post(self, request):
        username = request.data["username"]
        password = request.data["password"]
        return Response(error_handle(serialize(username, password)))

Answer 2

会发生什么？user_info 如果 request.method 既不是 GET 也不 POST?

@api_view(["GET", "POST"])
def user_info(request):
    if request.method == 'GET':
        # ...
        return JsonResponse(error_handle(serialize(username, password)))

    if request.method == 'POST':
        # ..
        return JsonResponse(error_handle(serialize(username, password)))

    # ???
    # Something should be returned here!