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
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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, o" v( A  h' O) ]python调试代码出错；
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代码如下：def hello_world(request):    print(reverse('hello_world'))    return HttpResponse('hello world')
6 l% m( `5 v) R" i; F+ }9 @1 |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。
3 O! }# }# I/ E8 w: \2 T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。
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
( j! x5 L+ G/ v: \; ~! P9 S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？


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admin

视图函数改成单引号在外面
def hello_world(request):
    print('reverse(hello_world)')
    return HttpResponse('hello world')
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3 n$ y. r$ Z% Q+ |. U5 C2 f
: ^6 ~* l0 c8 P5 r( W2 v3 Odef hello_world(request):
    'reverse(hello_world)'
    return HttpResponse('hello world')
8 ^9 c% r" F0 ?% E


7 G+ J( S* r$ E[19/Mar/2025 08:12:55] "GET /hello/world/ HTTP/1.1" 200 11


reverse(hello_world)

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或者这样子写也行：
def hello_world(request):
    reverse1 = 'reverse(hello_world)'
6 o6 h+ }, N5 @5 P0 l    print(reverse1)
3 {; S' y, r) Z2 [    return HttpResponse('hello world')
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6 g: ?# J- G5 V7 S, h5 k" M0 n" L都可以获取到逆向解析，并且成功。
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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/
1 d6 t" D" P/ {! nTraceback (most recent call last):
4 x) ]+ t7 ~% }  p9 ?  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    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)
5 H9 X8 K, v/ H" W& A- M! K  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)
7 x8 e7 i. |) D3 N0 P/ E; R. K# J  File "C:\Users\admin\Desktop\testmyproject\hello\views.py", line 11, in hello_china
! ^; u8 Z( E( R* F* a1 H    url= reverse('hello_china')
  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\urls\base.py", line 87, in reverse
5 B' T/ h# |1 X! W# ]7 I! j    return iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs))
8 R. V4 A5 O$ b4 N  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\urls\resolvers.py", line 617, in _reverse_with_prefix
    self._populate()
  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\urls\resolvers.py", line 455, in _populate
  C2 @" f8 e7 a% o- c. `$ w    for url_pattern in reversed(self.url_patterns):
" q( T+ ^# {  Y$ `! BTypeError: 'set' object is not reversible
/ v5 _- m) g4 r* I[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

urlpatterns = {
$ O8 b2 _% A! T  ^6 ^; m: X    path('admin/', admin.site.urls),
    path('hello/', hello_world),
    path('hello/', include('hello.urls')),
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需要改成
1 t& @: }3 g7 ]! T4 xurlpatterns = [
    path('admin/', admin.site.urls),
    path('hello/', hello_world),
: f0 U) @( P' N" l0 S7 Y    path('hello/', include('hello.urls')),
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1 B0 t9 j/ Y' P6 Z; H! `3 e$ f6 Z; |1 s问题完美解决。