Django ValueError

Question

當我在名爲Practical Django Projects的書上練習時，遇到了一些問題。當我點擊Url關於我的文章的詳細信息時，它返回一個錯誤。
urls.py

url(r'^weblog/$','django.views.generic.date_based.archive_index',entry_info_dict), 
url(r'^weblog/(P<year>\d{4}/$)','django.views.generic.date_based.archive_year', entry_info_dict), 
url(r'^weblog/(P<year>\d{4}/(P<month>\w{3})/$)','django.views.generic.date_based.archive_month', entry_info_dict), 
url(r'^weblog/(P<year>\d{4}/(P<month>\w{3})/(P<day>\d{2})/$)','django.views.generic.date_based.archive_day', entry_info_dict), 
url(r'^weblog/(?P<year>\d{4}/(?P<month>\w{3})/(P<day>\d{2})/(P<slug>[-\w]+)/$)',"blogCategory.views.entry_detail"), 

views.py

def entry_detail(request, year, month, day, slug): 
    date_stamp=time.strptime(year+month+day, "%Y%b%d") 
    pub_date=datetime.date(*date_stamp[:3]) 
    entry=get_object_or_404(Entry,pub_date__year=pub_date.year, 
     pub_date__month=pub_date.month, 
     pub_date__day=pub_date.day, 
     slug=slug) 
    return render_to_response('Entry/entry_detail.html',{'entry': entry }) 

錯誤：

Traceback : 
ValueError at /weblog/2012/dec/04/test22/ 

time data u'2012/dec/04/test22/dec04' does not match format '%Y%b%d' 

Request Method:  GET 
Request URL: /weblog/2012/dec/04/test22/ 
Django Version:  1.4.1 
Exception Type:  ValueError 
Exception Value:  

time data u'2012/dec/04/test22/dec04' does not match format '%Y%b%d' 

Exception Location:  /usr/lib/python2.7/_strptime.py in _strptime, line 325 
Python Executable: /usr/bin/python 
Python Version:  2.7.3 

Answer 1

錯誤的數據被傳遞給strptime在這裏看到：

>>> time.strptime('2012dec04','%Y%b%d') 
time.struct_time(tm_year=2012, tm_mon=12, tm_mday=4, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=1, tm_yday=339, tm_isdst=-1) 
>>> time.strptime('2012/dec/04/test22/dec04','%Y%b%d') 
Traceback (most recent call last): 
    File "<stdin>", line 1, in <module> 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_strptime.py", line 454, in _strptime_time 
    return _strptime(data_string, format)[0] 
    File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/_strptime.py", line 325, in _strptime 
    (data_string, format)) 
ValueError: time data '2012/dec/04/test22/dec04' does not match format '%Y%b%d' 
>>> 

其原因是因爲你的第一組未閉：

# yours 
url(r'^weblog/(?P<year>\d{4}/(?P<month>\w{3})/(P<day>\d{2})/(P<slug>[-\w]+)/$)',"blogCategory.views.entry_detail"), 

# change to 
url(r'^weblog/(?P<year>\d{4})/(?P<month>\w{3})/(P<day>\d{2})/(P<slug>[-\w]+)/$',"blogCategory.views.entry_detail"), 

你必須在第一組結束了$而不是第一/