Django ImportError: No module named middleware

Question

I am using Django version 1.8 and python 2.7. I am getting the following error after running my project.

Traceback (most recent call last):
  File "C:\Python27\lib\wsgiref\handlers.py", line 85, in run
    self.result = application(self.environ, self.start_response)
  File "C:\Python27\lib\site-packages\django\contrib\staticfiles\handlers.py", line 63, in __call__
    return self.application(environ, start_response)
  File "C:\Python27\lib\site-packages\django\core\handlers\wsgi.py", line 170, in __call__
    self.load_middleware()
  File "C:\Python27\lib\site-packages\django\core\handlers\base.py", line 50, in load_middleware
    mw_class = import_string(middleware_path)
  File "C:\Python27\lib\site-packages\django\utils\module_loading.py", line 26, in import_string
    module = import_module(module_path)
  File "C:\Python27\lib\importlib\__init__.py", line 37, in import_module
    __import__(name)
ImportError: No module named middleware
[26/Aug/2015 20:34:29] "GET /favicon.ico HTTP/1.1" 500 59

This is my settings.py file

"""
Django settings for collageapp project.

Generated by 'django-admin startproject' using Django 1.8.

For more information on this file, see
https://docs.djangoproject.com/en/1.8/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.8/ref/settings/
"""

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
import os

APP_PATH = os.path.dirname(os.path.abspath(__file__))
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = '******************************************************'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'manageApp',
    'django.contrib.sites',
    'allauth',
    'allauth.account',
    'allauth.socialaccount',
    'allauth.socialaccount.providers.facebook',
    'allauth.socialaccount.providers.google',
    'django.contrib.admindocs',
    'rest_framework',
)

SITE_ID = 1

MIDDLEWARE_CLASSES = (
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
    'django.middleware.security.SecurityMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    'oauth2_provider.middleware.OAuth2TokenMiddleware',
)


ROOT_URLCONF = 'collageapp.urls'
CORS_ORIGIN_ALLOW_ALL = True

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
                'allauth.account.context_processors.account',
                'allauth.socialaccount.context_processors.socialaccount'
            ],
        },
    },
]

WSGI_APPLICATION = 'collageapp.wsgi.application'


# Database
# https://docs.djangoproject.com/en/1.8/ref/settings/#databases

DATABASES = {
     'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'college_app',
        'USER': 'root',
        'PASSWORD': '',
        'HOST': 'localhost',   # Or an IP Address that your DB is hosted on
        'PORT': '3306',
    }
}



# Internationalization
# https://docs.djangoproject.com/en/1.8/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.8/howto/static-files/

STATIC_URL = '/static/'

I have tried surfing the error but in vain. My same code is working fine in other machine.

Answer 1

Open up a python shell by running python manage.py shell in your project directory.

Run the following commands one at a time in the python shell:

>>> from corsheaders.middleware import CorsMiddleware
>>> from oauth2_provider.middleware import OAuth2TokenMiddleware
>>> from django.contrib.auth.middleware import SessionAuthenticationMiddleware

One of the lines should give you an error like the following:

Traceback (most recent call last):
  File "<console>", line 1, in <module>
ImportError: No module named middleware

The line that gives you that error is the missing module that is giving you the problem.

To find the path where the modules are searched, do

>>> import sys; sys.path

---

Alternatively, if you don't know how to use the python shell, you could just remove the following lines in your settings.MIDDLEWARE_CLASSES one at a time until you don't get that error anymore:

'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'corsheaders.middleware.CorsMiddleware',
'oauth2_provider.middleware.OAuth2TokenMiddleware',

---

Just reinstall the package that gave you the error.

django.contrib.auth.middleware -> django

corsheaders.middleware -> corsheaders

oauth2_provider.middleware -> oauth2_provider