TypeError at /hello/world/ 'set' object is not reversible

admin

TypeError at /hello/world/'set' object is not reversible
TypeError at /hello/world/'set' object is not reversibleRequest Method:        GETRequest URL:        http://192.168.7.26:5000/hello/world/Django Version:        3.0.5Exception Type:        TypeErrorException Value:        'set' object is not reversibleException Location:        C:\Users\admin\python3.8vitual\lib\site-packages\django\urls\resolvers.py in _populate, line 455Python Executable:        C:\Users\admin\python3.8vitual\Scripts\python.exePython Version:        3.8.8Python Path:        ['C:\\Users\\admin\\Desktop\\myproject', 'C:\\Users\\admin\\Desktop\\myproject', 'C:\\Program Files\\JetBrains\\PyCharm ' '2019.3\\plugins\\python\\helpers\\pycharm_display', 'C:\\Program Files\\Python38\\python38.zip', 'C:\\Program Files\\Python38\\DLLs', 'C:\\Program Files\\Python38\\lib', 'C:\\Program Files\\Python38', 'C:\\Users\\admin\\python3.8vitual', 'C:\\Users\\admin\\python3.8vitual\\lib\\site-packages', 'C:\\Program Files\\JetBrains\\PyCharm ' '2019.3\\plugins\\python\\helpers\\pycharm_matplotlib_backend']Server time:        Tue, 18 Mar 2025 13:44:02 +0000
( z6 }, A8 C1 }) {$ l) ?0 W在python控制台上调试错误如下：Internal Server Error: /hello/world/Traceback (most recent call last):  File "C:\Users\admin\python3.8vitual\lib\site-packages\django\core\handlers\exception.py", line 34, in inner    response = get_response(request)  File "C:\Users\admin\python3.8vitual\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response    response = self.process_exception_by_middleware(e, request)  File "C:\Users\admin\python3.8vitual\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response    response = wrapped_callback(request, *callback_args, **callback_kwargs)  File "C:\Users\admin\Desktop\myproject\hello\views.py", line 9, in hello_world    print(reverse(hello_world))  File "C:\Users\admin\python3.8vitual\lib\site-packages\django\urls\base.py", line 87, in reverse    return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))  File "C:\Users\admin\python3.8vitual\lib\site-packages\django\urls\resolvers.py", line 617, in _reverse_with_prefix    self._populate()  File "C:\Users\admin\python3.8vitual\lib\site-packages\django\urls\resolvers.py", line 455, in _populate    for url_pattern in reversed(self.url_patterns):TypeError: 'set' object is not reversible[18/Mar/2025 21:43:50] "GET /hello/world/ HTTP/1.1" 500 81009C:\Users\admin\Desktop\myproject\hello\views.py changed, reloading.Watching for file changes with StatReloaderPerforming system checks...
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$ P* P5 |$ _( Z, xpython调试代码出错；
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0 j# ]- n$ Z) z' k7 r7 q代码如下：def hello_world(request):    print(reverse('hello_world'))    return HttpResponse('hello world')
% [) |3 K2 m( z* J* ~- F这个时我们在测试逆向解析的时候报的。怎么都不知道哪儿错了。
怀疑自己的配置有问题，各种测试好像找不到问题所在。
7 f( m6 G/ ]5 `- ^' |然后想着这个是不是引号的位置不对，带着这个想法修改下def hello_world(request):    print('reverse(hello_world)')    return HttpResponse('hello world')
再次访问，既然不报错了。正常反馈结构。
: t" ^& y2 `$ @0 q5 f并在控制台上返回结果为：reverse(hello_world)[18/Mar/2025 21:41:27] "GET /hello/world/ HTTP/1.1" 200 11
问题暂时解决了，但想不通为啥和老师讲的做的有些区别，难道是因为pycharm版本不一致导致的吗？

admin

视图函数改成单引号在外面
1 t5 e/ }, B2 }, U4 Ndef hello_world(request):
) S  I+ l% K( L* D9 q    print('reverse(hello_world)')
    return HttpResponse('hello world')
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( o8 ~/ F& W' W" }/ R
% h  O4 o1 T! h  @$ L4 |* sdef hello_world(request):
    'reverse(hello_world)'
    return HttpResponse('hello world')
9 N0 i$ T, i) H- l2 p4 C7 H


[19/Mar/2025 08:12:55] "GET /hello/world/ HTTP/1.1" 200 11

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reverse(hello_world)


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或者这样子写也行：
def hello_world(request):
    reverse1 = 'reverse(hello_world)'
    print(reverse1)
    return HttpResponse('hello world')
. m9 J$ k% P; k
都可以获取到逆向解析，并且成功。

% O# }5 a1 m8 f2 f" m& l; A

admin

说明我们上面没有配置成功。出现问题了。只是打印处理reverse(hello world) .

admin

Internal Server Error: /hello/china/
Traceback (most recent call last):
  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
" n5 o7 u( o# M1 w4 R& w* a    response = get_response(request)
  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\admin\Desktop\testmyproject\hello\views.py", line 11, in hello_china
# q2 w' J4 X, n! I! b    url= reverse('hello_china')
  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\urls\base.py", line 87, in reverse
    return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\urls\resolvers.py", line 617, in _reverse_with_prefix
% `$ b* K7 i; g4 x: a    self._populate()
  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\urls\resolvers.py", line 455, in _populate
    for url_pattern in reversed(self.url_patterns):
. K9 y9 o! S8 x& a  E4 yTypeError: 'set' object is not reversible
" K. ~9 c; O% f2 @[23/Mar/2025 22:26:12] "GET /hello/china/ HTTP/1.1" 500 81834

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问题的原因找到了，是因为根路径下的urls.py 文件中
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urlpatterns = {
    path('admin/', admin.site.urls),
1 S/ G: j+ F- ^    path('hello/', hello_world),
8 W* G7 f* f7 W, L    path('hello/', include('hello.urls')),
}
0 t( ~- z2 m8 \  U# i3 p需要改成
urlpatterns = [
    path('admin/', admin.site.urls),
5 i& r& X* e. o5 m- {' F: S    path('hello/', hello_world),
    path('hello/', include('hello.urls')),
/ q7 o' B4 F7 j* E) f! D]
5 g4 T' [, x" `* a问题完美解决。