lostplaces-backend/source/lostplaces/lostplaces_app/urls.py

from django.urls import path
from .views import hello_world, place_detail_view, place_list_view

urlpatterns = [
    path('hello_world/', hello_world),
    path('place/<int:pk>/', place_detail_view),
    path('places/', place_list_view)
]