django book example HELP..

Dipo Elegbede

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Feb 18, 2011, 10:04:13 AM2/18/11

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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 = """<html>

# <head><title>MY HOME</title></head>

# <body bgcolor='yellow'>

# <center>

# <h1><span style='color:green'>This is my </span><span style='color:white'>way of</span><span style='color:green'> saying welcome!</span></h1>

# </center>

# </body>

# </html>

# """

# return HttpResponse(message)

#

#def hello(request):

# return HttpResponse("Hello World")

#

#def current_time(request):

# now = datetime.datetime.now()

# html = "<html><body>It is now %s.</body></html>" % 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 = "<html><body>In %s hour(s), it will be %s.</body></html>" % (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

Tom Evans

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Feb 18, 2011, 10:20:07 AM2/18/11

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On Fri, Feb 18, 2011 at 3:04 PM, Dipo Elegbede <dele...@dudupay.com> wrote:
>
> 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 = """<html>
> # <head><title>MY HOME</title></head>
> # <body bgcolor='yellow'>
> # <center>

> 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.
>
>
>

These should help you:

http://docs.djangoproject.com/en/1.2/topics/http/urls/#named-groups
http://docs.djangoproject.com/en/1.2/topics/http/urls/#notes-on-capturing-text-in-urls

Also, please configure your MUA to wrap lines at ~78 characters when
sending emails to mailing lists.

Cheers

Tom

Dipo Elegbede

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Feb 18, 2011, 10:31:17 AM2/18/11

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Thumbs up Tom.

I didn't even bother to open the links you sent, I just finished the tutorial.

The name of the link said it all, capturing-text-in urls.

I am most grateful.

thanks all.

I would have to read the links however to master these things.

Regards.

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Chris Cogdon

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Dec 13, 2012, 5:49:44 PM12/13/12

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Typo on that typo! That slash should also be inside the parenthesis:

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

Note, though, I tend not to be so specific with URL matching... consider if someone hacked a URL to read time/plus/999/ ... The above will cause a 404, where letting it through to your code, with something like (\d+) gives you the opportunity to respond instead with something more specific to the error, such as redirecting to a "sensible default" along with a message. The "correct behavior" depends on your application design.

On Thursday, December 13, 2012 1:32:30 AM UTC-8, 向浩 wrote:

(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：

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