does not appear to have any patterns in it. If you see the 'urlpatterns' variable with valid patterns in the file then the issue is probably caused by a circular import.

django.core.exceptions.ImproperlyConfigured: The included URLconf '<module 'first_app.urls' from 'D:\\project\\first_project\\first_app\\urls.py'>' does not appear to have any patterns in it. If you see the 'urlpatterns' variable with valid patterns in the file then the issue is probably caused by a circular import.

urls中的

urlpatterns 写错了，少写了一个字母n.

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patterns the urlpatterns circular probablypatterns the urlpatterns circular the leetcode circular losers urlpattern urlpatterns urlpattern javaweb servlet circular urlpattern servlet probably probability converting typeerror structure circular