由于官网教程讲得迷迷糊糊的，所以我提炼了下代码，发现便于理解很多。
URLconf 技巧
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# 在模块开始导入关联的视图函数，直接传递函数对象
from django.conf.urls import include, url
from django.contrib import admin
from mysite.views import hello, current_datetime, hours_ahead
urlpatterns = [
url(r'^admin/', include(admin.site.urls)),
url(r'^hello/$', hello),
url(r'^time/$', current_datetime),
url(r'^time/plus/(\d{1,2})/$', hours_ahead),
]
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# 在模块开始导入 views 模块，传递 views.视图函数
from django.conf.urls import include, url
from django.contrib import admin
from mysite import views
urlpatterns = [
url(r'^admin/', include(admin.site.urls)),
url(r'^hello/$', views.hello),
url(r'^time/$', views.current_datetime),
url(r'^time/plus/(\d{1,2})/$', views.hours_ahead),
]
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# 传入一个包含模块名+函数名的对象
from django.conf.urls import include, url
from django.contrib import admin
urlpatterns = [
url(r'^admin/', include(admin.site.urls)),
url(r'^hello/$', 'mysite.views.hello'),
url(r'^time/$', 'mysite.views.current_datetime'),
url(r'^time/plus/(\d{1,2})/$', 'mysite.views.hours_ahead'),
]
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# 开启 URLconf 调试模式
from django.conf.urls import include, url
from django.contrib import admin
from mysite import views
urlpatterns = [
url(r'^admin/', include(admin.site.urls)),
url(r'^hello/$', views.hello),
url(r'^time/$', views.current_datetime),
url(r'^time/plus/(\d{1,2})/$', views.hours_ahead),
]
if settings.DEBUG:
urlpatterns += url(r'^debuginfo/$', views.debug),
)
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命名组
我觉得命名组的模式增加了代码冗余度，且语义化也不好。对于我这种懒人完全不需要 ：D (其实就是我懒的借口)
而它的目的在于，将变量以位置参数的方式传递给视图函数变为以关键字参数的方式传递。
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# 无名组，以位置参数传递变量
from django.conf.urls import include, url
from django.contrib import admin
from mysite import views
urlpatterns = [
url(r'^admin/', include(admin.site.urls)),
url(r'^articles/(\d{4})/$'， view.year_archive),
url(r'^articles/(\d{4})/(\d{2})/$', views.month_archive),
]
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# 命名组，以关键字参数传递变量
from django.conf.urls import include, url
from django.contrib import admin
from mysite import views
urlpatterns = [
url(r'^admin/', include(admin.site.urls)),
url(r'^articles/(?P<year>\d{4})/$'， view.year_archive),
url(r'^articles/(?P<year>\d{4})/(?<month>\d{2})/$', views.month_archive),
]
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