TypeError at /admin/ 'set' object is not reversible and argument( ) to reverse must be a sequence

Question

My app was working perfectly but when I tried the admin url, this error occurred.I can access every page of the website except for the admin page. My project is mini mini.urls.py

from django.conf.urls import url,include
from django.contrib import admin

urlpatterns = [
     url(r'^admin/', admin.site.urls),
     url(r'^', include('main.urls')),
     url(r'^', include('signup.urls',namespace='signup')),
]

main.urls.py

 from django.conf.urls import url,include
 from . import views

 urlpatterns = [
      url(r'^$', views.index,name='index'),
 ]

signup.urls.py

 from django.conf.urls import url,include
 from . import views

 urlpatterns = {
    url(r'^signup/$', views.register, name='register'),
    url(r'^login/$', views.login_user, name='login'),
    url(r'^userpage/$', views.user_page, name='userpage'),
    url(r'^upload/$', views.upload_file, name='upload'),
    url(r'^logout/$', views.logout_user, name='logout'),
    url(r'^(?P<uuid>[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]
                                {12})/$', views.doc_detail, name='detail'),
    url(r'^(?P<uuid>[a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]
                                {12})/decrypt/$', views.doc_decrypt, 
                                            name='docdecrypt'),
     }

The error I ran into at /admin/

     TypeError at /admin/
     'set' object is not reversible
     Request Method:    GET
     Request URL:   http://127.0.0.1:8000/admin/
     Django Version:    1.10.5
     Exception Type:    TypeError
     Exception Value:   
     'set' object is not reversible
     Exception Location:    
     C:\Users\user\AppData\Local\Programs\Python\Python36-32\lib\site-
     packages\django\urls\resolvers.py in _populate, line 196
     Python Executable: 
     C:\Users\user\AppData\Local\Programs\Python\Python36-32\python.exe
     Python Version:    3.6.0
     Python Path:   
     ['C:\\Users\\user\\Desktop\\django projects\\mini',
     'C:\\Users\\user\\AppData\\Local\\Programs\\Python\\Python36-
     32\\python36.zip',
     'C:\\Users\\user\\AppData\\Local\\Programs\\Python\\Python36-32\\DLLs',
     'C:\\Users\\user\\AppData\\Local\\Programs\\Python\\Python36-32\\lib',
     'C:\\Users\\user\\AppData\\Local\\Programs\\Python\\Python36-32',
     'C:\\Users\\user\\AppData\\Local\\Programs\\Python\\Python36-
     32\\lib\\site-packages']

I tried running my webapp in another pc so I ran into the following error:

     TypeError at /admin/
     argument to reversed() must be a sequence
     Request Method:    GET
     Request URL:   http://127.0.0.1:8000/admin/
     Django Version:    1.10.5
     Exception Type:    TypeError
     Exception Value:   
     argument to reversed() must be a sequence
     Exception Location:    C:\Python27\lib\site-
     packages\django\urls\resolvers.py in _populate, line 196
     Python Executable: C:\Python27\python.exe
     Python Version:    2.7.12
     Python Path:   
     ['C:\\Users\\Admin\\Desktop\\mini',
     'C:\\Python27\\lib\\site-packages\\steganography-0.1.1-py2.7.egg',
     'C:\\Python27\\lib\\site-packages\\pillow-4.0.0-py2.7-win32.egg',
     'C:\\Python27\\lib\\site-packages\\olefile-0.44-py2.7.egg',
     'C:\\WINDOWS\\SYSTEM32\\python27.zip',
     'C:\\Python27\\DLLs',
     'C:\\Python27\\lib',
     'C:\\Python27\\lib\\plat-win',
     'C:\\Python27\\lib\\lib-tk',
     'C:\\Python27',
     'C:\\Python27\\lib\\site-packages']

Answer 1

in signup.urls.py change the brackets from these { } to [ ] these this will work

Answer 2

change {} to [] in main.urls.py

Answer 3

Check the file urls.py in that file check the Square brackets in the urlpatterns = [] because its in the Curly bracket it will show the 'set' object is not reversible and argument( ) error...Try this it is working...

Answer 4

I had same problem with my project, changed the curly brackets {} to box brackets [] and problem solved.

Answer 5

Just change {} to [] in project.urls.py :

urlpatterns = [
     url(r'^admin/', admin.site.urls),
     url(r'^', include('main.urls')),
     url(r'^', include('signup.urls',namespace='signup'))
]