Django base.py: 'str' object is not callable

[imhomer]

I met this problem (Django base.py: 'str' object is not callable) when I go through a Django tutorial:

photo/models.py:

from django.db import models
from django.contrib.auth.models import User
from django.contrib import admin
 
class Album(models.Model):
    title = models.CharField(max_length=60)
    public = models.BooleanField(default=False)
    def __unicode__(self):
        return self.title
 
class Tag(models.Model):
    tag = models.CharField(max_length=50)
    def __unicode__(self):
        return self.tag
 
class Image(models.Model):
    title = models.CharField(max_length=60, blank=True, null=True)
    image = models.FileField(upload_to="images/")
    tags = models.ManyToManyField(Tag, blank=True)
    albums = models.ManyToManyField(Album, blank=True)
    created = models.DateTimeField(auto_now_add=True)
    rating = models.IntegerField(default=50)
    width = models.IntegerField(blank=True, null=True)
    height = models.IntegerField(blank=True, null=True)
    user = models.ForeignKey(User, null=True, blank=True)
 
    def __unicode__(self):
        return self.image.name
 
class AlbumAdmin(admin.ModelAdmin):
    search_fields = ["title"]
    list_display = ["title"]
 
class TagAdmin(admin.ModelAdmin):
    list_display = ["tag"]
 
class ImageAdmin(admin.ModelAdmin):
    search_fields = ["title"]
    list_display = ["__unicode__", "title", "user", "rating", "created"]
    list_filter = ["tags", "albums"]
 
admin.site.register(Album, AlbumAdmin)
admin.site.register(Tag, TagAdmin)
admin.site.register(Image, ImageAdmin)

photo/views.py:

from django.http import HttpResponseRedirect, HttpResponse
from django.shortcuts import get_object_or_404, render_to_response
from django.contrib.auth.decorators import login_required
from django.core.context_processors import csrf
from django.core.paginator import Paginator, InvalidPage, EmptyPage
from django.forms import ModelForm
from settings import MEDIA_URL
 
from dbe.photo.models import *
 
def main(request):
    """Main listing."""
    albums = Album.objects.all()
    if not request.user.is_authenticated():
        albums = albums.filter(public=True)
 
    paginator = Paginator(albums, 10)
    try: page = int(request.GET.get("page", '1'))
    except ValueError: page = 1
 
    try:
        albums = paginator.page(page)
    except (InvalidPage, EmptyPage):
        albums = paginator.page(paginator.num_pages)
 
    for album in albums.object_list:
        album.images = album.image_set.all()[:4]
 
    return render_to_response("photo/list.html", dict(albums=albums, user=request.user,
        media_url=MEDIA_URL))

Main urls.py:

from django.conf.urls.defaults import patterns, include, url
 
 
 
# Uncomment the next two lines to enable the admin:
 
from django.contrib import admin
 
admin.autodiscover()
 
 
 
urlpatterns = patterns('',
 
    # Examples:
 
    # url(r'^$', 'SoEasy.views.home', name='home'),
 
    # url(r'^SoEasy/', include('SoEasy.foo.urls')),
 
 
 
    # Uncomment the admin/doc line below to enable admin documentation:
 
    # url(r'^admin/doc/', include('django.contrib.admindocs.urls')),
 
 
 
    # Uncomment the next line to enable the admin:
 
    url(r'^admin/', include(admin.site.urls)),
    url(r"", "main"),
)

I really hope someone could help me solve the problem! Thanks!

[andrean]

your urls.py has the error,
url(r"", "main"),

change it to:
url(r"", "yourprojectname.views.main"),

or import the views module and

url(r"", views.main),