I need to find out how to do this efficiently.

marietje/marietje/settings.py

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+"""
+Django settings for marietje project.
+"""
+
+import os
+
+# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+SECRET_KEY = 'sae2hahHao1soo0Ocoz5Ieh1Ushae6feJe4mooliooj0Ula8'
+DEBUG = True
+ALLOWED_HOSTS = ['*']
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'marietje',
+    'queues',
+    'songs',
+    'stats'
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'marietje.urls'
+
+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',
+                'marietje.context_processors.global_settings',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'marietje.wsgi.application'
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.mysql',
+        'NAME': 'marietje',
+        'USER': 'marietje',
+        'PASSWORD': 'v8TzZwdAdSi7Tk5I',
+        'HOST': 'localhost',
+        'PORT': '3306',
+        'OPTIONS': { 'init_command': "SET sql_mode='STRICT_TRANS_TABLES'" },
+    }
+}
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+PASSWORD_HASHERS = [
+    'django.contrib.auth.hashers.Argon2PasswordHasher',
+    'django.contrib.auth.hashers.PBKDF2PasswordHasher',
+    'django.contrib.auth.hashers.PBKDF2SHA1PasswordHasher',
+    'django.contrib.auth.hashers.Argon2PasswordHasher',
+    'django.contrib.auth.hashers.BCryptSHA256PasswordHasher',
+    'django.contrib.auth.hashers.BCryptPasswordHasher',
+    'django.contrib.auth.hashers.UnsaltedMD5PasswordHasher',
+]
+
+CACHES = {
+    'default': {
+        'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
+        'LOCATION': '/var/tmp/MarietjeDjango_cache/default',
+        'OPTIONS': { 'MAX_ENTRIES': 1000 },
+    },
+    'song_search': {
+        'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
+        'LOCATION': '/var/tmp/MarietjeDjango_cache/song_search',
+        'OPTIONS': { 'MAX_ENTRIES': 1000 },
+    },
+    'userstats': {
+        'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
+        'LOCATION': '/var/tmp/MarietjeDjango_cache/default',
+        'OPTIONS': { 'MAX_ENTRIES': 1500 },
+    },
+}
+
+AUTH_USER_MODEL = 'marietje.User'
+LANGUAGE_CODE = 'en-us'
+TIME_ZONE = 'Europe/Amsterdam'
+USE_I18N = True
+USE_L10N = True
+USE_TZ = True
+
+
+# zc files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/1.10/howto/static-files/
+
+BASE_URL = 'https://marietje-zuid.science.ru.nl'
+
+STATIC_ROOT = os.path.join(BASE_DIR, 'static')
+STATIC_URL = '/static/'
+LOGIN_URL = '/login/'
+LOGIN_REDIRECT_URL = '/'
+LOGOUT_REDIRECT_URL = '/'
+
+# App specific settings
+
+BERTHA_HOST = ('bach.science.ru.nl', 1234)
+MAIL_FROM = 'marietje@marietje.science.ru.nl'
+MAX_MINUTES_IN_A_ROW = 45
+
+# Time range (dependent on timezone specified) when MAX_MINUTES_IN_A_ROW is in effect.
+LIMIT_HOURS = (12, 13)
+LIMIT_MINUTES = (15, 45)
+LIMIT_ALWAYS = True
+
+CONTACT_EMAIL = 'marietje@science.ru.nl'
+
+STATS_TOP_COUNT = 50
+STATS_REQUEST_IGNORE_USER_IDS = []
+
+ISSUES_URL = 'https://gitlab.science.ru.nl/Marietje/MarietjeDjango/issues'
+MERGE_REQUESTS_URL = 'https://gitlab.science.ru.nl/Marietje/MarietjeDjango/merge_requests'
+TRUSTED_IP_RANGES = [
+    '131.174.0.0/16',   # RU wired
+    '145.116.136.0/22', # eduroam
+]