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python - Django / python "multiple repeat"

转载 作者:太空宇宙 更新时间:2023-11-04 03:52:38 25 4
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我正在研究 python 基础知识。我遇到了这样的问题,我无法弄清楚。

View .py

# -*- coding: utf-8 -*-

from django.http import HttpResponse
import datetime

def hello(request):
return HttpResponse("Hello, World!")

def time(request):
now = datetime.datetime.now()
html = "<html><body>Teraz jest %s</body></html>" %now
return HttpResponse(html)

def time_offset(request, offset):
delta = int(offset)
dt = datetime.datetime.now() + datetime.timedelta(hours=offset)
assert False
shtml = "<html><body>za %s godzin będzie %s</body></html>" % (delta,dt)
return HttpResponse(shtml)

网址.py

# -*- coding: utf-8 -*-
from django.conf.urls import patterns, include, url


urlpatterns = patterns('',
url(r'^hello$', 'mysite.views.hello', name='hello'),
url(r'^time$', 'mysite.views.time', name='time'),
url(r'^time\plus\(/d+{1,2})$', 'mysite.views.time_offset', name='time_offset'), )

都是关于我 url 的最后一行。我正在那里激活我的新 View “time_offset”,它一定有问题,但我不知道是什么?我无法让这个 View 工作。

谢谢你的帮助,干杯!

错误代码:

error at /time/plus/2
multiple repeat
Request Method: GET
Request URL: http://127.0.0.1:8000/time/plus/2
Django Version: 1.4.5
Exception Type: error
Exception Value:
multiple repeat
Exception Location: /usr/lib/python2.7/re.py in _compile, line 242
Python Executable: /usr/bin/python
Python Version: 2.7.3
Python Path:
['/home/maze/Dokumenty/djcode/mysite',
'/usr/lib/python2.7',
'/usr/lib/python2.7/plat-linux2',
'/usr/lib/python2.7/lib-tk',
'/usr/lib/python2.7/lib-old',
'/usr/lib/python2.7/lib-dynload',
'/usr/local/lib/python2.7/dist-packages',
'/usr/lib/python2.7/dist-packages',
'/usr/lib/python2.7/dist-packages/PIL',
'/usr/lib/python2.7/dist-packages/gtk-2.0',
'/usr/lib/pymodules/python2.7']
Server time: Tue, 10 Dec 2013 04:40:17 -0600

最佳答案

正则表达式结合了两个重复修饰符(+, {1, 2})

>>> re.compile(r'\d+{1,2}')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\re.py", line 190, in compile
return _compile(pattern, flags)
File "C:\Python27\lib\re.py", line 242, in _compile
raise error, v # invalid expression
sre_constants.error: multiple repeat

仅使用 +{1,2}:

>>> re.compile(r'\d{1,2}')
<_sre.SRE_Pattern object at 0x00000000025C5458>
>>> re.compile(r'\d+')
<_sre.SRE_Pattern object at 0x0000000002A454F0>

顺便说一句,似乎代码交换了 \/

... r'^time\plus\(/d+{1,2})$ ...
# ^ ^ ^

关于python - Django / python "multiple repeat",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20496867/

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