Reg Ex Django URL Conf
这是我的 django URLconf：
urlpatterns = patterns('',
('^hello/$', hello),
(r'^polls/$', 'mysite.polls.views.index'),
(r'^polls/(?P<poll_id>\d+)/$', 'mysite.polls.views.detail'),
(r'^polls/(?P<poll_id>\d+)/results/$', 'mysite.polls.views.results'),
(r'^polls/(?P<poll_id>\d+)/vote/$', 'mysite.polls.views.vote'),
(r'^admin/', include(admin.site.urls)),
)
我不明白这个正则表达式中的 r 的作用：
r'^polls/$
我不明白这个正则表达式的作用：
(?P<poll_id>\d+)
而且我不明白为什么：
(r'^admin/', include(admin.site.urls))
没有 $ 符号它仍然有效...
我不明白我必须添加什么 URLconf 才能查看 http://127.0.0.1:8000/ 下的站点
These is my django URLconf:
urlpatterns = patterns('',
('^hello/
I don't understand what the r in this regex does:
r'^polls/$
I don't understand what this Regex does:
(?P<poll_id>\d+)
And I don't understand why in:
(r'^admin/', include(admin.site.urls))
There is no $ sign and it still works...
I don't understand what URLconf I have to add, to see a site under http://127.0.0.1:8000/
, hello),
(r'^polls/
I don't understand what the r in this regex does:
I don't understand what this Regex does:
And I don't understand why in:
There is no $ sign and it still works...
I don't understand what URLconf I have to add, to see a site under http://127.0.0.1:8000/
, 'mysite.polls.views.index'),
(r'^polls/(?P<poll_id>\d+)/
I don't understand what the r in this regex does:
I don't understand what this Regex does:
And I don't understand why in:
There is no $ sign and it still works...
I don't understand what URLconf I have to add, to see a site under http://127.0.0.1:8000/
, 'mysite.polls.views.detail'),
(r'^polls/(?P<poll_id>\d+)/results/
I don't understand what the r in this regex does:
I don't understand what this Regex does:
And I don't understand why in:
There is no $ sign and it still works...
I don't understand what URLconf I have to add, to see a site under http://127.0.0.1:8000/
, 'mysite.polls.views.results'),
(r'^polls/(?P<poll_id>\d+)/vote/
I don't understand what the r in this regex does:
I don't understand what this Regex does:
And I don't understand why in:
There is no $ sign and it still works...
I don't understand what URLconf I have to add, to see a site under http://127.0.0.1:8000/
, 'mysite.polls.views.vote'),
(r'^admin/', include(admin.site.urls)),
)
I don't understand what the r in this regex does:
I don't understand what this Regex does:
And I don't understand why in:
There is no $ sign and it still works...
I don't understand what URLconf I have to add, to see a site under http://127.0.0.1:8000/
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评论（4）
“r”表示“原始”字符串，这使得在尝试编写正则表达式时变得更容易（您最终不会转义转义字符）。 http://docs.python.org/library/re.html#raw -string-notation
就第二个问题而言，它创建一个由 1 个或多个数字组成的命名匹配组，并将该值作为“poll_id”传递给视图。 http://docs.djangoproject.com/en/1.2/ topic/http/urls/#named-groups
管理字符串上没有 $ 的原因是您希望将所有以 /admin 开头的 url 传递到管理应用程序。 $ 是定义字符串结尾的特殊字符。因此，如果有 $，则只有 url /admin 会传递到管理应用程序，而不是 /admin/foo 或 /admin/foo/bar。
The 'r' denotes a 'raw' string, which makes life easier when trying to write regexes (you don't end up escaping the escape characters). http://docs.python.org/library/re.html#raw-string-notation
As far as the second question goes, it creates a named match group of 1 or more digits, and passes that value to the view as 'poll_id'. http://docs.djangoproject.com/en/1.2/topics/http/urls/#named-groups
The reason there isn't a $ on the admin string is that you want all urls that start with /admin to be passed to the admin app. $ is a special character that defines the end of a string. So if there were an $, then only the url /admin would be passed to the admin app, not /admin/foo or /admin/foo/bar.
阅读文档， http://docs.djangoproject .com/en/1.2/topics/http/urls/#topics-http-urls
read the docs, http://docs.djangoproject.com/en/1.2/topics/http/urls/#topics-http-urls
我的 python 正则表达式很生锈，但这里是：
^意思是开头。$表示结尾(?P\d+) 表示一个整数\d+，在我的代码中它将被放入变量中poll_id(r'^admin/', include(admin.site.urls))没有 $ 因为您可能不希望 url 在那里结束。您希望将 admin/somethingelse 传递给您的 admin.sites.urls 类。
My python regex is rusty but here goes:
the
^means starts with.The
$means the end(?P<poll_id>\d+)means an integer\d+which in my code will be put into a variablepoll_id(r'^admin/', include(admin.site.urls))doesn't have a $ because you may not want the url to end there. You want admin/somethingelse to be passed to your admin.sites.urls class.
r 表示提供的字符串是原始字符串，应忽略转义字符。
(r'^admin/', include(admin.site.urls))行没有$因为它是另一个 url confs 的包含。因此，结尾$位于admin.site.urls中的某个位置。The
rmeans the provided string is raw and escape characters should be ignored. The(r'^admin/', include(admin.site.urls))line has no$because it is an include for another url confs. So the end$is somewhere in theadmin.site.urls.