diff --git a/config.py b/config.py
index 895ddf5..50af9d4 100644
--- a/config.py
+++ b/config.py
@@ -1,6 +1,7 @@
-''' yes
+# -*- coding: utf-8 -*-
+"""
 Configuration overrides for settings.py
-'''
+"""
 
 import os
 import sys
@@ -14,50 +15,59 @@ from ivatar.settings import INSTALLED_APPS
 from ivatar.settings import TEMPLATES
 
 ADMIN_USERS = []
-ALLOWED_HOSTS = ['*']
+ALLOWED_HOSTS = ["*"]
 
-INSTALLED_APPS.extend([
-    'django_extensions',
-    'django_openid_auth',
-    'bootstrap4',
-    'anymail',
-    'ivatar',
-    'ivatar.ivataraccount',
-    'ivatar.tools',
-])
+INSTALLED_APPS.extend(
+    [
+        "django_extensions",
+        "django_openid_auth",
+        "bootstrap4",
+        "anymail",
+        "ivatar",
+        "ivatar.ivataraccount",
+        "ivatar.tools",
+    ]
+)
 
-MIDDLEWARE.extend([
-    'django.middleware.locale.LocaleMiddleware',
-])
+MIDDLEWARE.extend(
+    [
+        "django.middleware.locale.LocaleMiddleware",
+    ]
+)
 MIDDLEWARE.insert(
-    0, 'ivatar.middleware.MultipleProxyMiddleware',
+    0,
+    "ivatar.middleware.MultipleProxyMiddleware",
 )
 
 AUTHENTICATION_BACKENDS = (
     # Enable this to allow LDAP authentication.
     # See INSTALL for more information.
     # 'django_auth_ldap.backend.LDAPBackend',
-    'django_openid_auth.auth.OpenIDBackend',
-    'django.contrib.auth.backends.ModelBackend',
+    "django_openid_auth.auth.OpenIDBackend",
+    "django.contrib.auth.backends.ModelBackend",
 )
 
-TEMPLATES[0]['DIRS'].extend([
-    os.path.join(BASE_DIR, 'templates'),
-])
-TEMPLATES[0]['OPTIONS']['context_processors'].append(
-    'ivatar.context_processors.basepage',
+TEMPLATES[0]["DIRS"].extend(
+    [
+        os.path.join(BASE_DIR, "templates"),
+    ]
+)
+TEMPLATES[0]["OPTIONS"]["context_processors"].append(
+    "ivatar.context_processors.basepage",
 )
 
 OPENID_CREATE_USERS = True
 OPENID_UPDATE_DETAILS_FROM_SREG = True
 
-SITE_NAME = os.environ.get('SITE_NAME', 'libravatar')
-IVATAR_VERSION = '1.4'
+SITE_NAME = os.environ.get("SITE_NAME", "libravatar")
+IVATAR_VERSION = "1.4"
 
-SECURE_BASE_URL = os.environ.get('SECURE_BASE_URL', 'https://avatars.linux-kernel.at/avatar/')
-BASE_URL = os.environ.get('BASE_URL', 'http://avatars.linux-kernel.at/avatar/')
+SECURE_BASE_URL = os.environ.get(
+    "SECURE_BASE_URL", "https://avatars.linux-kernel.at/avatar/"
+)
+BASE_URL = os.environ.get("BASE_URL", "http://avatars.linux-kernel.at/avatar/")
 
-LOGIN_REDIRECT_URL = reverse_lazy('profile')
+LOGIN_REDIRECT_URL = reverse_lazy("profile")
 MAX_LENGTH_EMAIL = 254  # http://stackoverflow.com/questions/386294
 
 MAX_NUM_PHOTOS = 5
@@ -75,119 +85,120 @@ MIN_LENGTH_EMAIL = 6  # eg. x@x.xx
 MAX_LENGTH_EMAIL = 254  # http://stackoverflow.com/questions/386294
 
 BOOTSTRAP4 = {
-    'include_jquery': False,
-    'javascript_in_head': False,
-    'css_url': {
-        'href': '/static/css/bootstrap.min.css',
-        'integrity':
-            'sha384-WskhaSGFgHYWDcbwN70/dfYBj47jz9qbsMId/iRN3ewGhXQFZCSftd1LZCfmhktB',
-        'crossorigin': 'anonymous',
+    "include_jquery": False,
+    "javascript_in_head": False,
+    "css_url": {
+        "href": "/static/css/bootstrap.min.css",
+        "integrity": "sha384-WskhaSGFgHYWDcbwN70/dfYBj47jz9qbsMId/iRN3ewGhXQFZCSftd1LZCfmhktB",
+        "crossorigin": "anonymous",
     },
-    'javascript_url': {
-        'url': '/static/js/bootstrap.min.js',
-        'integrity': '',
-        'crossorigin': 'anonymous',
+    "javascript_url": {
+        "url": "/static/js/bootstrap.min.js",
+        "integrity": "",
+        "crossorigin": "anonymous",
     },
-    'popper_url': {
-        'url': '/static/js/popper.min.js',
-        'integrity':
-            'sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49',
-        'crossorigin': 'anonymous',
+    "popper_url": {
+        "url": "/static/js/popper.min.js",
+        "integrity": "sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49",
+        "crossorigin": "anonymous",
     },
 }
 
-if 'EMAIL_BACKEND' in os.environ:
-    EMAIL_BACKEND = os.environ['EMAIL_BACKEND']  # pragma: no cover
+if "EMAIL_BACKEND" in os.environ:
+    EMAIL_BACKEND = os.environ["EMAIL_BACKEND"]  # pragma: no cover
 else:
-    if 'test' in sys.argv or 'collectstatic' in sys.argv:
-        EMAIL_BACKEND = 'django.core.mail.backends.locmem.EmailBackend'
+    if "test" in sys.argv or "collectstatic" in sys.argv:
+        EMAIL_BACKEND = "django.core.mail.backends.locmem.EmailBackend"
     else:
         try:
             ANYMAIL = {  # pragma: no cover
-                'MAILGUN_API_KEY': os.environ['IVATAR_MAILGUN_API_KEY'],
-                'MAILGUN_SENDER_DOMAIN': os.environ['IVATAR_MAILGUN_SENDER_DOMAIN'],
+                "MAILGUN_API_KEY": os.environ["IVATAR_MAILGUN_API_KEY"],
+                "MAILGUN_SENDER_DOMAIN": os.environ["IVATAR_MAILGUN_SENDER_DOMAIN"],
             }
-            EMAIL_BACKEND = 'anymail.backends.mailgun.EmailBackend'  # pragma: no cover
-        except Exception as exc:  # pragma: nocover
-            EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
+            EMAIL_BACKEND = "anymail.backends.mailgun.EmailBackend"  # pragma: no cover
+        except Exception:  # pragma: nocover  # pylint: disable=broad-except
+            EMAIL_BACKEND = "django.core.mail.backends.smtp.EmailBackend"
 
-SERVER_EMAIL = os.environ.get('SERVER_EMAIL', 'ivatar@mg.linux-kernel.at')
-DEFAULT_FROM_EMAIL = os.environ.get('DEFAULT_FROM_EMAIL', 'ivatar@mg.linux-kernel.at')
+SERVER_EMAIL = os.environ.get("SERVER_EMAIL", "ivatar@mg.linux-kernel.at")
+DEFAULT_FROM_EMAIL = os.environ.get("DEFAULT_FROM_EMAIL", "ivatar@mg.linux-kernel.at")
 
 try:
     from ivatar.settings import DATABASES
 except ImportError:  # pragma: no cover
     DATABASES = []  # pragma: no cover
 
-if 'default' not in DATABASES:
-    DATABASES['default'] = {  # pragma: no cover
-        'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
+if "default" not in DATABASES:
+    DATABASES["default"] = {  # pragma: no cover
+        "ENGINE": "django.db.backends.sqlite3",
+        "NAME": os.path.join(BASE_DIR, "db.sqlite3"),
     }
 
-if 'MYSQL_DATABASE' in os.environ:
-    DATABASES['default'] = {  # pragma: no cover
-        'ENGINE': 'django.db.backends.mysql',
-        'NAME': os.environ['MYSQL_DATABASE'],
-        'USER': os.environ['MYSQL_USER'],
-        'PASSWORD': os.environ['MYSQL_PASSWORD'],
-        'HOST': 'mysql',
+if "MYSQL_DATABASE" in os.environ:
+    DATABASES["default"] = {  # pragma: no cover
+        "ENGINE": "django.db.backends.mysql",
+        "NAME": os.environ["MYSQL_DATABASE"],
+        "USER": os.environ["MYSQL_USER"],
+        "PASSWORD": os.environ["MYSQL_PASSWORD"],
+        "HOST": "mysql",
     }
 
-if 'POSTGRESQL_DATABASE' in os.environ:
-    DATABASES['default'] = {  # pragma: no cover
-        'ENGINE': 'django.db.backends.postgresql',
-        'NAME': os.environ['POSTGRESQL_DATABASE'],
-        'USER': os.environ['POSTGRESQL_USER'],
-        'PASSWORD': os.environ['POSTGRESQL_PASSWORD'],
-        'HOST': 'postgresql',
+if "POSTGRESQL_DATABASE" in os.environ:
+    DATABASES["default"] = {  # pragma: no cover
+        "ENGINE": "django.db.backends.postgresql",
+        "NAME": os.environ["POSTGRESQL_DATABASE"],
+        "USER": os.environ["POSTGRESQL_USER"],
+        "PASSWORD": os.environ["POSTGRESQL_PASSWORD"],
+        "HOST": "postgresql",
     }
 
-SESSION_SERIALIZER = 'django.contrib.sessions.serializers.PickleSerializer'
+SESSION_SERIALIZER = "django.contrib.sessions.serializers.PickleSerializer"
 
 USE_X_FORWARDED_HOST = True
-ALLOWED_EXTERNAL_OPENID_REDIRECT_DOMAINS = ['avatars.linux-kernel.at', 'localhost',]
+ALLOWED_EXTERNAL_OPENID_REDIRECT_DOMAINS = [
+    "avatars.linux-kernel.at",
+    "localhost",
+]
 
 DEFAULT_AVATAR_SIZE = 80
 
-LANGUAGES = (                                                                                                                                                 
-  ('de', _('Deutsch')),
-  ('en', _('English')),
-  ('ca', _('Català')),
-  ('cs', _('Česky')),
-  ('es', _('Español')),
-  ('eu', _('Basque')),
-  ('fr', _('Français')),
-  ('it', _('Italiano')),
-  ('ja', _('日本語')),
-  ('nl', _('Nederlands')),
-  ('pt', _('Português')),
-  ('ru', _('Русский')),
-  ('sq', _('Shqip')),
-  ('tr', _('Türkçe')),
-  ('uk', _('Українська')),
+LANGUAGES = (
+    ("de", _("Deutsch")),
+    ("en", _("English")),
+    ("ca", _("Català")),
+    ("cs", _("Česky")),
+    ("es", _("Español")),
+    ("eu", _("Basque")),
+    ("fr", _("Français")),
+    ("it", _("Italiano")),
+    ("ja", _("日本語")),
+    ("nl", _("Nederlands")),
+    ("pt", _("Português")),
+    ("ru", _("Русский")),
+    ("sq", _("Shqip")),
+    ("tr", _("Türkçe")),
+    ("uk", _("Українська")),
 )
 
 MESSAGE_TAGS = {
-  message_constants.DEBUG: 'debug',
-  message_constants.INFO: 'info',
-  message_constants.SUCCESS: 'success',
-  message_constants.WARNING: 'warning',
-  message_constants.ERROR: 'danger',
+    message_constants.DEBUG: "debug",
+    message_constants.INFO: "info",
+    message_constants.SUCCESS: "success",
+    message_constants.WARNING: "warning",
+    message_constants.ERROR: "danger",
 }
 
 CACHES = {
-  'default': {
-    'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
-    'LOCATION': [
-        '127.0.0.1:11211',
-    ],
-  },
-  'filesystem': {
-    'BACKEND': 'django.core.cache.backends.filebased.FileBasedCache',
-    'LOCATION': '/var/tmp/ivatar_cache',
-    'TIMEOUT': 900, # 15 minutes
-  }
+    "default": {
+        "BACKEND": "django.core.cache.backends.memcached.MemcachedCache",
+        "LOCATION": [
+            "127.0.0.1:11211",
+        ],
+    },
+    "filesystem": {
+        "BACKEND": "django.core.cache.backends.filebased.FileBasedCache",
+        "LOCATION": "/var/tmp/ivatar_cache",
+        "TIMEOUT": 900,  # 15 minutes
+    },
 }
 
 # This is 5 minutes caching for generated/resized images,
@@ -197,5 +208,5 @@ CACHE_IMAGES_MAX_AGE = 5 * 60
 CACHE_RESPONSE = True
 
 # This MUST BE THE LAST!
-if os.path.isfile(os.path.join(BASE_DIR, 'config_local.py')):
+if os.path.isfile(os.path.join(BASE_DIR, "config_local.py")):
     from config_local import *  # noqa # flake8: noqa # NOQA # pragma: no cover