def list(self, request):
        user = User.objects.all()
        serializer = UserSerializer(user, many=True)
        return send_response(request.method, serializer)
Return a substring of the string at ``key``. ``start`` and ``end``
dataset/ETHPy150Open CiscoSystems/cognitive/cognitive/app/api/users.py/UserViewSet.list--crossover with--dataset/ETHPy150Open gmr/mredis/mredis/client.py/MRedis.substr