Django URL 语法错误

Question

我正在创建一个维基应用程序。当我在 urls.py 中为我的应用程序创建 url 时，我收到语法错误消息。我不擅长正则表达式。

这是我的代码，

(r'wikicamp/(?<page_name>[^/]+)/edit/$', 'wikicamp.wiki.views.edit_page'),
(r'wikicamp/(?<page_name>[^/]+)/save/$', 'wikicamp.wiki.views.save_page'),
(r'wikicamp/(?<page_name>[^/]+)/$', 'wikicamp.wiki.views.view_page'),

我的错误是，

error at /
syntax error
Request Method: GET
Request URL:    http://127.0.0.1:8000/
Django Version: 1.2.5
Exception Type: error
Exception Value:    
syntax error
Exception Location: /usr/lib/python2.6/re.py in _compile, line 245
Python Executable:  /usr/bin/python
Python Version: 2.6.6
Python Path:    ['/home/ztron/wikicamp', '/usr/lib/python2.6', '/usr/lib/python2.6/plat-linux2', '/usr/lib/python2.6/lib-tk', '/usr/lib/python2.6/lib-old', '/usr/lib/python2.6/lib-dynload', '/usr/local/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages/PIL', '/usr/lib/python2.6/dist-packages/gst-0.10', '/usr/lib/pymodules/python2.6', '/usr/lib/python2.6/dist-packages/gtk-2.0', '/usr/lib/pymodules/python2.6/gtk-2.0']
Server time:    Wed, 13 Apr 2011 15:21:18 -0500

正则表达式有什么问题吗？我确实阅读了 django 文档，但仍然不知道。

谢谢！

Answer 1

您命名的捕获组缺少“P”。这样做：

(r'wikicamp/(?P<page_name>[^/]+)/edit/
, 'wikicamp.wiki.views.edit_page'),
(r'wikicamp/(?P<page_name>[^/]+)/save/
, 'wikicamp.wiki.views.save_page'),
(r'wikicamp/(?P<page_name>[^/]+)/
, 'wikicamp.wiki.views.view_page'),

Answer 2

根据 http://docs.python.org/library/re.html 语法对于命名组来说

(?P<name>...)

这意味着你应该有

(r'wikicamp/(?P<page_name>[^/]+)/edit/
, 'wikicamp.wiki.views.edit_page'),