Problema com Django

[marcos_regato]

Boa noite, estou estudando Django, comprei o livro Django Essencial, escrevi o mesmo cógido do livro

import sys

from django.conf import settings

settings.cofigure(
    DEBUG=True,
    SECRET_KEY='thisisthesecretkey',
    ROOT_URLCONF=__name__,
    MIDDLEWARE_CLASSES=(
        'django.middleware.common.CommonMiddleware',
        'django.middleware.csrf.CsrfViewMiddleware',
        'django.middleware.clickjacking.XFrameOptionsMiddleware',
    ),

from django.conf.urls import url
from django.http import HttpResponse

def index(request):
    return HttpResponse('deu certo')

urlpatterns=(
    url(r'^$',index),

)
if __name__=="__main__":
    from django.core.management import execute_from_command_line
    execute_from_command_line(sys.argv)

mas deu um erro.

Traceback (most recent call last):
File "settings", line 5, in <module>
settings.cofigure(
File "/usr/lib/python2.7/dist-packages/django/conf/__init__.py", line 46, in __getattr__
self._setup(name)
File "/usr/lib/python2.7/dist-packages/django/conf/__init__.py", line 40, in _setup
% (desc, ENVIRONMENT_VARIABLE))
django.core.exceptions.ImproperlyConfigured: Requested setting cofigure, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.

Alguém pode me ajuda?

Editado Julho 8, 2015 por marcos_regato