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
: `7 x1 N7 P# N, H9 R7 \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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python调试代码出错；
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$ s6 @' [* s( _+ `4 \( t+ Z代码如下：def hello_world(request):    print(reverse('hello_world'))    return HttpResponse('hello world')
6 ^: R6 U' y6 {- }5 F* K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。
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')
! s* ^' h/ {+ }( x2 j再次访问，既然不报错了。正常反馈结构。
' O+ a2 [. D0 h$ _" j! Z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？
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admin

视图函数改成单引号在外面
$ ^- g/ H% T0 W# a  V, q+ Zdef hello_world(request):
    print('reverse(hello_world)')
    return HttpResponse('hello world')

% l  n1 t" K' y
# `0 c. Y0 R: O4 i- Ldef hello_world(request):
& V4 c  J" F3 ?+ a( |/ C8 M, r    'reverse(hello_world)'
    return HttpResponse('hello world')

% U5 N2 G0 E, A$ V  w$ h

/ F4 P1 Y9 p" o9 I; H$ b6 |[19/Mar/2025 08:12:55] "GET /hello/world/ HTTP/1.1" 200 11
  X  {  x) }, Y$ y, q0 }8 }5 I
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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')

) u# x1 Q" G3 x, e, q* O都可以获取到逆向解析，并且成功。

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):
9 _' M# h$ B" D+ {( d  File "C:\Users\admin\python3.8.2-vitual\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
0 p6 S5 n& c% g+ ?5 S- e0 }  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
    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))
+ K# C! ]0 @7 _1 y0 I0 K  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
    for url_pattern in reversed(self.url_patterns):
, P* I5 c0 P3 J# t3 MTypeError: 'set' object is not reversible
[23/Mar/2025 22:26:12] "GET /hello/china/ HTTP/1.1" 500 81834

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+ ~0 F$ R* X- d/ F  ]7 v问题的原因找到了，是因为根路径下的urls.py 文件中

urlpatterns = {
' f3 |, p0 F3 b% s) p    path('admin/', admin.site.urls),
    path('hello/', hello_world),
/ s! P/ j) ], V9 s5 V5 L- Q9 g4 w, N- X    path('hello/', include('hello.urls')),
) ~& ~+ @. ]4 O0 a}
! x- T. m# V: t/ T% _+ ~需要改成
, _) M! s' y& U( m+ b8 Iurlpatterns = [
- i8 `8 T8 S3 T: I* q    path('admin/', admin.site.urls),
5 D4 T4 r& p$ D' W, Q9 a; p6 I+ U    path('hello/', hello_world),
  M, B) k- q$ v. r' m$ _$ X6 N/ t    path('hello/', include('hello.urls')),
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问题完美解决。