Django: error at / bad character in group name - django

Question

I was following Apress - Practical Django Project by James Bennet and I got this nasty error out of the blue. Could you help me?
Here it goes:
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/
Django Version: 1.2.5
Python Version: 2.5.4
Installed Applications:
['django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.admin',
'django.contrib.flatpages',
'cms.search',
'coltrane',
'tagging']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware')
Traceback:
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/core/handlers/base.py" in get_response
91. request.path_info)
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/core/urlresolvers.py" in resolve
215. for pattern in self.url_patterns:
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/core/urlresolvers.py" in _get_url_patterns
244. patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/core/urlresolvers.py" in _get_urlconf_module
239. self._urlconf_module = import_module(self.urlconf_name)
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/utils/importlib.py" in import_module
35. __import__(name)
File "/Users/danielcorreia/Sites/test_Django/cms/../cms/urls.py" in <module>
21. (r'', include('django.contrib.flatpages.urls')),
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/conf/urls/defaults.py" in patterns
24. t = url(prefix=prefix, *t)
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/conf/urls/defaults.py" in url
41. return RegexURLPattern(regex, view, kwargs, name)
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/django/core/urlresolvers.py" in __init__
89. self.regex = re.compile(regex, re.UNICODE)
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/re.py" in compile
188. return _compile(pattern, flags)
File "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/re.py" in _compile
241. raise error, v # invalid expression
Exception Type: error at /
Exception Value: bad character in group name
Oh! I'm a newbie to Django. Please be gentle :)
Here's the urls.py:
from django.conf.urls.defaults import *
# Uncomment the next two lines to enable the admin:
from django.contrib import admin
admin.autodiscover()
urlpatterns = patterns('',
# Example:
# (r'^cms/', include('cms.foo.urls')),
# Uncomment the admin/doc line below to enable admin documentation:
# (r'^admin/doc/', include('django.contrib.admindocs.urls')),
# Uncomment the next line to enable the admin:
(r'^admin/', include(admin.site.urls)),
(r'tiny_mce/(?P<path>.*)$', 'django.views.static.serve', { 'document_root': '/Users/danielcorreia/Sites/tinymce/jscripts/tiny_mce' }),
(r'^search/$', 'cms.search.views.search'),
(r'^weblog/$', 'coltrane.views.entries_index'),
(r'^weblog/(?P<year\d{4})/(?P<month>\w{3})/(?P<day>\d{2})/(P?<slug>[-\w]+)/$', 'coltrane.views.entry_detail'),
(r'', include('django.contrib.flatpages.urls')),
)

Answer 1

(r'^weblog/(?P<year\d{4})/(?P<month>\w{3})/(?P<day>\d{2})/(P?<slug>[-\w]+)/$', 'coltrane.views.entry_detail'),
Change to:
(r'^weblog/(?P<year>\d{4})/(?P<month>\w{3})/(?P<day>\d{2})/(P?<slug>[-\w]+)/$', 'coltrane.views.entry_detail'),
Note the closing angle bracket for the year group.