在遵循 django 教程时解耦 urls.py 的问题

发布于 2024-08-28 16:28:48 字数 980 浏览 7 评论 0原文

http://docs.djangoproject.com/en/dev/intro/tutorial03/< /a>

我正在执行解耦 URLconf 其中教程说明了如何解耦 urls.py。完全按照它所说的去做时，我收到以下错误-

error at /polls/1/
nothing to repeat
Request Method: GET
Request URL:    http://localhost:8000/polls/1/
Exception Type: error
Exception Value:    
nothing to repeat
Exception Location: C:\jython2.5.1\Lib\re.py in _compile, line 241
Python Executable:  C:\jython2.5.1\jython.bat
Python Version: 2.5.1
Python Path:    ['E:\\Programming\\Project\\django_app\\mysite', 'C:\\jython2.5.1\\Lib\\site-packages\\setuptools-0.6c11-py2.5.egg', 'C:\\jython2.5.1\\Lib', '__classpath__', '__pyclasspath__/', 'C:\\jython2.5.1\\Lib\\site-packages']
Server time:    Mon, 12 Apr 2010 12:02:56 +0530

原文

http://docs.djangoproject.com/en/dev/intro/tutorial03/

I was at the step Decoupling the URLconfs where the tutorial illustrates how to decouple urls.py. On doing exactly what it says, i get the following error-

error at /polls/1/
nothing to repeat
Request Method: GET
Request URL:    http://localhost:8000/polls/1/
Exception Type: error
Exception Value:    
nothing to repeat
Exception Location: C:\jython2.5.1\Lib\re.py in _compile, line 241
Python Executable:  C:\jython2.5.1\jython.bat
Python Version: 2.5.1
Python Path:    ['E:\\Programming\\Project\\django_app\\mysite', 'C:\\jython2.5.1\\Lib\\site-packages\\setuptools-0.6c11-py2.5.egg', 'C:\\jython2.5.1\\Lib', '__classpath__', '__pyclasspath__/', 'C:\\jython2.5.1\\Lib\\site-packages']
Server time:    Mon, 12 Apr 2010 12:02:56 +0530

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一袭水袖舞倾城 2024-09-04 16:28:48

检查您的正则表达式语法。特别是，查看模式开头的 ? 之前是否缺少左括号，如

r'^?P<poll_id>\d+)/
上面的内容所示
r'^(?P<poll_id>\d+)/
。
 （解释：“无重复”是一个正则表达式错误，它是由于 ? 正则表达式运算符发生在其前面没有可以合理附加的内容而引起的。??(?P<...>...) 中的 code> 会被特殊处理，但是如果您忘记了左括号，正则表达式引擎将处理 ? 中的 ?常规方式，在 ^ 之后没有任何意义。）

#  ^ note the missing parenthesis

上面的内容所示

。
 （解释：“无重复”是一个正则表达式错误，它是由于 ? 正则表达式运算符发生在其前面没有可以合理附加的内容而引起的。??(?P<...>...) 中的 code> 会被特殊处理，但是如果您忘记了左括号，正则表达式引擎将处理 ? 中的 ?常规方式，在 ^ 之后没有任何意义。）

。

（解释：“无重复”是一个正则表达式错误，它是由于 ? 正则表达式运算符发生在其前面没有可以合理附加的内容而引起的。??(?P<...>...) 中的 code> 会被特殊处理，但是如果您忘记了左括号，正则表达式引擎将处理 ? 中的 ?常规方式，在 ^ 之后没有任何意义。）

# ^ note the missing parenthesis

上面的内容所示

。

Check your regex syntax. In particular, see if you are missing an opening parenthesis before a ? towards the beginning of the pattern, as in

r'^?P<poll_id>\d+)/
The above should read
r'^(?P<poll_id>\d+)/
instead.
(An explanation: "nothing to repeat" is a regex error which arises due to an ? regex operator occurring where it is not preceded by something which it can sensibly attach to. The ? in (?P<...>...) is treated specially, but if you forget the opening parenthesis, the regex engine will treat ? in the regular way, which makes no sense right after ^.)

#  ^ note the missing parenthesis

The above should read

instead.
(An explanation: "nothing to repeat" is a regex error which arises due to an ? regex operator occurring where it is not preceded by something which it can sensibly attach to. The ? in (?P<...>...) is treated specially, but if you forget the opening parenthesis, the regex engine will treat ? in the regular way, which makes no sense right after ^.)

instead.

(An explanation: "nothing to repeat" is a regex error which arises due to an ? regex operator occurring where it is not preceded by something which it can sensibly attach to. The ? in (?P<...>...) is treated specially, but if you forget the opening parenthesis, the regex engine will treat ? in the regular way, which makes no sense right after ^.)

# ^ note the missing parenthesis

The above should read

instead.

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