settings.py: use tuples for INSTALLED_APPS and MIDDLEWARE

zoo/settings.py

@@ -48,7 +48,7 @@ ALLOWED_HOSTS = ['*']
 
 # Application definition
 
-INSTALLED_APPS = [
+INSTALLED_APPS = (
     'gadjo',
     'django.contrib.auth',
     'django.contrib.contenttypes',
@@ -63,9 +63,9 @@ INSTALLED_APPS = [
     'zoo.zoo_nanterre',
     'zoo.zoo_demo',
     'django.contrib.admin',
-]
+)
 
-MIDDLEWARE = [
+MIDDLEWARE = (
     'django.middleware.security.SecurityMiddleware',
     'django.contrib.sessions.middleware.SessionMiddleware',
     'django.middleware.common.CommonMiddleware',
@@ -73,7 +73,7 @@ MIDDLEWARE = [
     'django.contrib.auth.middleware.AuthenticationMiddleware',
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
-]
+)
 
 ROOT_URLCONF = 'zoo.urls'
 
@@ -95,7 +95,7 @@ TEMPLATES = [
 
 WSGI_APPLICATION = 'zoo.wsgi.application'
 
-STATICFILES_FINDERS = global_settings.STATICFILES_FINDERS + ['gadjo.finders.XStaticFinder']
+STATICFILES_FINDERS = list(global_settings.STATICFILES_FINDERS) + ['gadjo.finders.XStaticFinder']
 
 # Database
 # https://docs.djangoproject.com/en/1.10/ref/settings/#databases