Python-сообщество

INSTALLED_APPS = (
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    #'django.contrib.sites',
    #'django.contrib.messages',
    #'django.contrib.staticfiles',
    # Uncomment the next line to enable the admin:
     'django.contrib.admin',
    # Uncomment the next line to enable admin documentation:
    # 'django.contrib.admindocs',
    'books.models', #****************тут внимание***********************

from django.db import models
from django.contrib import admin
admin.site.register(Publisher)
admin.site.register(Author)
admin.site.register(Book)

from django.contrib import admin
from mysite.books.models import Publisher, Author, Book
admin.site.register(Publisher)
admin.site.register(Author)
admin.site.register(Book)