(r'^time/plus/\d{1,2}/$', hours_ahead),this line,you should use () for
d{1,2}
(r'^time/plus/\(d{1,2})/$', hours_ahead)
在 2011年2月18日星期五UTC+8下午11时04分13秒，Dipo Elegbede写道：
>
> Hi all,
>
> i am currently reading the django book and following the examples step by
> step.
>
> I have a view defined as follows:
>
> from django.http import Http404, HttpResponse
> import datetime
>
> #def myhome(request):
> #message = """
> #MY HOME
> #
> #
> #This is my
> way of
> saying welcome!
> #
> #
> #
> #"""
> #return HttpResponse(message)
> #
> #def hello(request):
> #return HttpResponse("Hello World")
> #
> #def current_time(request):
> #now = datetime.datetime.now()
> #html = "It is now %s." % now
> #return HttpResponse(html)
>
> def hours_ahead(request, offset):
> try:
> offset = int(offset)
> except ValueError:
> raise Http404()
> dt = datetime.datetime.now() + datetime.timedelta(hours=offset)
> html = "In %s hour(s), it will be %s." %
> (offset, dt)
> return HttpResponse(html)
>
> (All the commented area work just fine )
>
> and I have a url.py like this:
>
> from django.conf.urls.defaults import *
> from mysite.views import *
> from django.contrib import admin
> admin.autodiscover()
>
> urlpatterns = patterns('',
> (r'^$', myhome),
> (r'^polls/', include('mysite.polls.urls')),
> (r'^hello/$', hello),
> (r'^time/$', current_time),
> (r'^time/plus/\d{1,2}/$', hours_ahead),
> )
>
> when i try to run localhost:8000/time/plus/3, I get the following error:
>
> TypeError at /time/plus/4/
> hours_ahead() takes exactly 2 arguments (1 given)
> Request Method: GET
> Request URL: http://localhost:8000/time/plus/4/
> Django Version: 1.2.1
> Exception Type: TypeError
> Exception Value:
> hours_ahead() takes exactly 2 arguments (1 given)
> Exception Location:
> c:\Python26\lib\site-packages\django-1.2.1-py2.6.egg\django\core\handlers\base.py
>
> in get_response, line 100
> Python Executable: c:\Python26\python.exe
> Python Version: 2.6.4
> Python Path: ['c:\\users\\owner\\desktop\\djtask\\mysite',
> 'c:\\Python26\\lib\\site-packages\\django-1.2.1-py2.6.egg',
> 'c:\\Python26\\lib\\site-packages\\pip-0.8.2-py2.6.egg',
> 'C:\\Windows\\system32\\python26.zip', 'c:\\Python26\\DLLs',
> 'c:\\Python26\\lib', 'c:\\Python26\\lib\\plat-win',
> 'c:\\Python26\\lib\\lib-tk', 'c:\\Python26',
> 'c:\\Python26\\lib\\site-packages',
> 'c:\\Python26\\lib\\site-packages\\PIL',
> 'c:\\Python26\\lib\\site-packages\\wx-2.8-msw-unicode']
> Server time: Fri, 18 Feb 2011 15:51:57 +0100
>
> My understanding of the error message is that I supplied, 1 argument when
> the view function, hours_ahead was expecting 2 but really, i don't have a
> hang of where to put the other argument. I am following the examples in the
> book.
>
> I must be missing something, kindly help me out.
>
> thank you.
>
>
>
>
>
>
>
> --
> Elegbede Muhammed Oladipupo
> OCA
> +2348077682428
> +2347042171716
> www.dudupay.com
> Mobile Banking Solutions | Transaction Processing | Enterprise Application
> Development
>
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