python - Progress Bar Todo List Tutorial -

i have been following light bird beginner's tutorial django. link

in last part of part 1 tutorial tasked developing progress bar. not able progress bar work following code.

from django.db import models django.contrib import admin django.utils.translation import ugettext _ django.utils.encoding import force_unicode django.http import httpresponse, httpresponseredirect django.core.urlresolvers import reverse django.contrib.auth.models import user   # create models here.  class datetime(models.model):     datetime = models.datetimefield(auto_now_add=true)     def __unicode__(self):         return unicode(self.datetime.strftime("%b %d, %y, %i:%m %p"))  class item(models.model):     name = models.charfield(max_length=60)     progress = models.integerfield(default=0)     created = models.foreignkey(datetime)     priority = models.integerfield(default=0)     difficulty = models.integerfield(default=0)     done = models.booleanfield(default=false)     user = models.foreignkey(user, blank=true, null=true)     def mark_done(self):         return "<a href='%s'>done</a>" % reverse("todo.views.mark_done", args=[self.pk])     mark_done.allow_tags = true     def progress_(self):         return "<div style='width: 100px; border: 1px solid #ccc;'>" + \         "<div style='height: 4px; width: %dpx; background: #555; '></div></div>" % self.progress     progress_.allow_tags = true  class itemadmin(admin.modeladmin):     list_display = ["name", "priority", "difficulty", "created", "done", "user"]     search_fields = ["name"]  class iteminline(admin.tabularinline):     model = item  class dateadmin(admin.modeladmin):     list_display = ["datetime"]     inlines = [iteminline]     def response_add(self, request, obj, post_url_continue='../%s/'):         """ determines httpresponse add_view stage.  """         item in item.objects.filter(created=obj):             if not item.user:                 item.user = request.user                 item.save()             return httpresponseredirect(reverse("admin:todo_item_changelist"))         opts = obj._meta         pk_value = obj._get_pk_val()         msg = "item(s) added successfully."         # here, distinguish between different save types checking         # presence of keys in request.post.         if request.post.has_key("_continue"):             self.message_user(request, msg + ' ' + _("you may edit again below."))             if request.post.has_key("_popup"):                 post_url_continue += "?_popup=1"             return httpresponseredirect(post_url_continue % pk_value)          if request.post.has_key("_popup"):             return httpresponse(               '<script type="text/javascript">opener.dismissaddanotherpopup(window, "%s", "%s");'               '</script>' % (escape(pk_value), escape(obj)))         elif request.post.has_key("_addanother"):             self.message_user(request, msg + ' ' + (_("you may add %s below.") %                                                     force_unicode(opts.verbose_name)))             return httpresponseredirect(request.path)         else:             self.message_user(request, msg)              return httpresponseredirect(reverse("admin:todo_item_changelist"))  admin.site.register(item, itemadmin) admin.site.register(datetime, dateadmin) 

i not have progress bar on items page @ screenshot tutorial.

the answer simple , not addressed in tutorial @ all. in itemadmin class need add list_display "progress_" function defined in tutorial.

from django.db import models django.contrib import admin django.utils.translation import ugettext _ django.utils.encoding import force_unicode django.http import httpresponse, httpresponseredirect django.core.urlresolvers import reverse django.contrib.auth.models import user   # create models here.  class datetime(models.model):     datetime = models.datetimefield(auto_now_add=true)     def __unicode__(self):         return unicode(self.datetime.strftime("%b %d, %y, %i:%m %p"))  class item(models.model):     name = models.charfield(max_length=60)     progress = models.integerfield(default=0)     created = models.foreignkey(datetime)     priority = models.integerfield(default=0)     difficulty = models.integerfield(default=0)     done = models.booleanfield(default=false)     user = models.foreignkey(user, blank=true, null=true)     def mark_done(self):         return "<a href='%s'>done</a>" % reverse("todo.views.mark_done", args=[self.pk])     mark_done.allow_tags = true     def progress_(self):         return "<div style='width: 100px; border: 1px solid #ccc;'>" + \         "<div style='height: 4px; width: %dpx; background: #555; '></div></div>" % self.progress     progress_.allow_tags = true  class itemadmin(admin.modeladmin):     list_display = ["name", "priority", "progress_", "difficulty", "created", "done", "user"]     search_fields = ["name"]  class iteminline(admin.tabularinline):     model = item  class dateadmin(admin.modeladmin):     list_display = ["datetime"]     inlines = [iteminline]     def response_add(self, request, obj, post_url_continue='../%s/'):         """ determines httpresponse add_view stage.  """         item in item.objects.filter(created=obj):             if not item.user:                 item.user = request.user                 item.save()             return httpresponseredirect(reverse("admin:todo_item_changelist"))         opts = obj._meta         pk_value = obj._get_pk_val()         msg = "item(s) added successfully."         # here, distinguish between different save types checking         # presence of keys in request.post.         if request.post.has_key("_continue"):             self.message_user(request, msg + ' ' + _("you may edit again below."))             if request.post.has_key("_popup"):                 post_url_continue += "?_popup=1"             return httpresponseredirect(post_url_continue % pk_value)          if request.post.has_key("_popup"):             return httpresponse(               '<script type="text/javascript">opener.dismissaddanotherpopup(window, "%s", "%s");'               '</script>' % (escape(pk_value), escape(obj)))         elif request.post.has_key("_addanother"):             self.message_user(request, msg + ' ' + (_("you may add %s below.") %                                                     force_unicode(opts.verbose_name)))             return httpresponseredirect(request.path)         else:             self.message_user(request, msg)              return httpresponseredirect(reverse("admin:todo_item_changelist"))  admin.site.register(item, itemadmin) admin.site.register(datetime, dateadmin)