django的url配置有问题

问题遇到的现象和发生背景

进不到/buy/id，id指的是数据库里面序号pk

问题相关代码，请勿粘贴截图

1.urls.py

from django.contrib import admin
from django.urls import path
from website import views


urlpatterns = [
    path('admin/', admin.site.urls),
    path('index/', views.index),
    path(r'buy/(?P<gid>\d+)/', views.buy),
]

2.views.py

def buy(request, gid):
    obj = models.Goods.objects.get(gid=pk)
    print(obj.name, obj.price, gid)

    no = str(uuid.uuid4())
    models.Order.objects.create(
        no=no,
        goods_id=obj.id
    )

运行结果及报错内容

Page not found (404)
Request Method:    GET
Request URL:    http://127.0.0.1:8000/buy/1/
Using the URLconf defined in Alipay_Final.urls, Django tried these URL patterns, in this order:

admin/
index/
buy/(?P<gid>\d+)/
The current path, buy/1/, didn’t match any of these.

You’re seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.

我的解答思路和尝试过的方法

我想要达到的结果

from django.urls import path, re_path
rlpatterns = [
    path('articles/2003/', views.special_case_2003),
    re_path(r'^articles/(?P<year>[0-9]{4})/$', views.year_archive),
    re_path(r'^articles/(?P<year>[0-9]{4})/(?P<month>[0-9]{2})/$', views.month_archive),
    re_path(r'^articles/(?P<year>[0-9]{4})/(?P<month>[0-9]{2})/(?P<slug>[\w-]+)/$', views.article_detail),
]

rom django.urls import path

from . import views

urlpatterns = [
    path('articles/2003/', views.special_case_2003),
    path('articles/<int:year>/', views.year_archive),
    path('articles/<int:year>/<int:month>/', views.month_archive),
    path('articles/<int:year>/<int:month>/<slug:slug>/', views.article_detail),
]

看看你需要的是哪种，