diff --git a/mayan/apps/common/icons.py b/mayan/apps/common/icons.py
index e689a21347..f23e4ba800 100644
--- a/mayan/apps/common/icons.py
+++ b/mayan/apps/common/icons.py
@@ -49,4 +49,3 @@ icon_support = Icon(
 icon_tools = Icon(
     driver_name='fontawesome', symbol='wrench'
 )
-
diff --git a/mayan/apps/common/models.py b/mayan/apps/common/models.py
index 2bcc9232c0..1f4209c79a 100644
--- a/mayan/apps/common/models.py
+++ b/mayan/apps/common/models.py
@@ -100,4 +100,3 @@ class UserLocaleProfile(models.Model):
     def natural_key(self):
         return self.user.natural_key()
     natural_key.dependencies = [settings.AUTH_USER_MODEL]
-
diff --git a/mayan/apps/documents/models.py b/mayan/apps/documents/models.py
index a51d1a674e..e3a154f717 100644
--- a/mayan/apps/documents/models.py
+++ b/mayan/apps/documents/models.py
@@ -848,7 +848,6 @@ class DocumentPage(models.Model):
 
         return final_url.tostr()
 
-
     def get_combined_transformation_list(self, *args, **kwargs):
         """
         Return a list of transformation containing the server side
diff --git a/mayan/apps/documents/settings.py b/mayan/apps/documents/settings.py
index e47e3086cd..f0927f8892 100644
--- a/mayan/apps/documents/settings.py
+++ b/mayan/apps/documents/settings.py
@@ -24,7 +24,7 @@ setting_documentimagecache_storage_arguments = namespace.add_setting(
         os.path.join(settings.MEDIA_ROOT, 'document_cache')
     ), help_text=_(
         'Arguments to pass to the DOCUMENT_CACHE_STORAGE_BACKEND.'
-    ),quoted=True,
+    ), quoted=True,
 )
 setting_disable_base_image_cache = namespace.add_setting(
     global_name='DOCUMENTS_DISABLE_BASE_IMAGE_CACHE', default=False,
diff --git a/mayan/apps/metadata/apps.py b/mayan/apps/metadata/apps.py
index 2782febbba..0fb3e6ad9a 100644
--- a/mayan/apps/metadata/apps.py
+++ b/mayan/apps/metadata/apps.py
@@ -22,7 +22,6 @@ from documents.signals import post_document_type_change
 from events import ModelEventType
 from events.links import (
     link_events_for_object, link_object_event_types_user_subcriptions_list,
-    link_object_event_types_user_subcriptions_list_with_icon
 )
 from events.permissions import permission_events_view
 from mayan.celery import app
@@ -31,8 +30,8 @@ from navigation import SourceColumn
 from .classes import DocumentMetadataHelper
 from .events import (
     event_document_metadata_added, event_document_metadata_edited,
-    event_document_metadata_removed,event_metadata_type_created,
-    event_metadata_type_edited, event_metadata_type_relationship
+    event_document_metadata_removed, event_metadata_type_edited,
+    event_metadata_type_relationship
 )
 from .handlers import (
     handler_index_document, post_document_type_metadata_type_add,
diff --git a/mayan/apps/metadata/events.py b/mayan/apps/metadata/events.py
index 23b2ca7633..85e9a77799 100644
--- a/mayan/apps/metadata/events.py
+++ b/mayan/apps/metadata/events.py
@@ -32,4 +32,3 @@ event_metadata_type_relationship = namespace.add_event_type(
         'Metadata type relationship updated'
     )
 )
-
diff --git a/mayan/apps/metadata/forms.py b/mayan/apps/metadata/forms.py
index 5b75af038a..83153abaae 100644
--- a/mayan/apps/metadata/forms.py
+++ b/mayan/apps/metadata/forms.py
@@ -172,7 +172,6 @@ DocumentMetadataRemoveFormSet = formset_factory(
 )
 
 
-
 class DocumentTypeMetadataTypeRelationshipForm(forms.Form):
     RELATIONSHIP_TYPE_NONE = 'none'
     RELATIONSHIP_TYPE_OPTIONAL = 'optional'
@@ -271,6 +270,7 @@ DocumentTypeMetadataTypeRelationshipFormSetBase = formset_factory(
     DocumentTypeMetadataTypeRelationshipForm, extra=0
 )
 
+
 class DocumentTypeMetadataTypeRelationshipFormSet(DocumentTypeMetadataTypeRelationshipFormSetBase):
     def __init__(self, *args, **kwargs):
         _user = kwargs.pop('_user')
diff --git a/mayan/apps/metadata/models.py b/mayan/apps/metadata/models.py
index 0dc2ee7cd6..bdcd2297bb 100644
--- a/mayan/apps/metadata/models.py
+++ b/mayan/apps/metadata/models.py
@@ -5,7 +5,7 @@ import shlex
 from django.core.exceptions import ValidationError
 from django.db import models
 from django.template import Context, Template
-from django.urls import reverse, reverse_lazy
+from django.urls import reverse
 from django.utils.encoding import force_text, python_2_unicode_compatible
 from django.utils.module_loading import import_string
 from django.utils.translation import ugettext_lazy as _
@@ -15,7 +15,7 @@ from documents.models import Document, DocumentType
 from .classes import MetadataLookup
 from .events import (
     event_document_metadata_added, event_document_metadata_edited,
-    event_document_metadata_removed,event_metadata_type_created,
+    event_document_metadata_removed, event_metadata_type_created,
     event_metadata_type_edited, event_metadata_type_relationship
 )
 from .managers import DocumentTypeMetadataTypeManager, MetadataTypeManager
diff --git a/mayan/apps/ocr/backends/pyocr.py b/mayan/apps/ocr/backends/pyocr.py
index eff1936064..9224d95293 100644
--- a/mayan/apps/ocr/backends/pyocr.py
+++ b/mayan/apps/ocr/backends/pyocr.py
@@ -48,12 +48,15 @@ class PyOCR(OCRBackendBase):
                 builder=pyocr.builders.TextBuilder()
             )
         except Exception as exception:
-            error_message = ('Exception calling pyocr with language option: '
-            '{}; {}').format(self.language, exception)
+            error_message = (
+                'Exception calling pyocr with language option: {}; {}'
+            ).format(self.language, exception)
 
             if self.language not in self.languages:
-                error_message = ('{}\nThe requested OCR language "{}" is not '
-                'available and needs to be installed.\n').format(
+                error_message = (
+                    '{}\nThe requested OCR language "{}" is not '
+                    'available and needs to be installed.\n'
+                ).format(
                     error_message, self.language
                 )
 
diff --git a/mayan/apps/ocr/models.py b/mayan/apps/ocr/models.py
index 293d6ff82b..f9b8a7d80a 100644
--- a/mayan/apps/ocr/models.py
+++ b/mayan/apps/ocr/models.py
@@ -35,7 +35,6 @@ class DocumentTypeSettings(models.Model):
     natural_key.dependencies = ['documents.DocumentType']
 
 
-
 @python_2_unicode_compatible
 class DocumentPageOCRContent(models.Model):
     document_page = models.OneToOneField(
diff --git a/mayan/apps/smart_settings/literals.py b/mayan/apps/smart_settings/literals.py
deleted file mode 100644
index d5fec7dd94..0000000000
--- a/mayan/apps/smart_settings/literals.py
+++ /dev/null
@@ -1,18 +0,0 @@
-from __future__ import unicode_literals
-
-#from importlib import import_module
-#import logging
-import os
-
-#import yaml
-
-from django.apps import apps
-from django.conf import settings
-#from django.utils.functional import Promise
-#from django.utils.encoding import force_text, python_2_unicode_compatible
-
-#SETTING_FILE_LAST_KNOWN_GOOD =
-CONFIGURATION_FILENAME = '_settings.yml'
-CONFIGURATION_FILEPATH = os.path.join(
-    settings.MEDIA_ROOT, CONFIGURATION_FILENAME
-)
diff --git a/mayan/apps/smart_settings/management/commands/revertsettings.py b/mayan/apps/smart_settings/management/commands/revertsettings.py
index 939ce3a097..7568723ddc 100644
--- a/mayan/apps/smart_settings/management/commands/revertsettings.py
+++ b/mayan/apps/smart_settings/management/commands/revertsettings.py
@@ -1,12 +1,10 @@
 from __future__ import unicode_literals
 
 import errno
-import os
 from shutil import copyfile
 
 from django.conf import settings
 from django.core import management
-from django.core.management.utils import get_random_secret_key
 
 
 class Command(management.BaseCommand):
diff --git a/mayan/apps/tags/apps.py b/mayan/apps/tags/apps.py
index ae1ecaf987..d6c28c3aeb 100644
--- a/mayan/apps/tags/apps.py
+++ b/mayan/apps/tags/apps.py
@@ -15,7 +15,6 @@ from documents.search import document_page_search, document_search
 from events import ModelEventType
 from events.links import (
     link_events_for_object, link_object_event_types_user_subcriptions_list,
-    link_object_event_types_user_subcriptions_list_with_icon
 )
 from events.permissions import permission_events_view
 from navigation import SourceColumn