diff --git a/mayan/apps/acls/apps.py b/mayan/apps/acls/apps.py
index 9f9cc2958f..8f746bd477 100644
--- a/mayan/apps/acls/apps.py
+++ b/mayan/apps/acls/apps.py
@@ -45,7 +45,7 @@ class ACLsApp(MayanAppConfig):
                 'acls:acl_class_multiple_grant',
                 'acls:acl_class_multiple_revoke'
             ],
-         )
+        )
         menu_setup.bind_links(links=[link_acl_setup_valid_classes])
         menu_sidebar.bind_links(links=[link_acl_holder_new], sources=[AccessObject])
 
diff --git a/mayan/apps/authentication/forms.py b/mayan/apps/authentication/forms.py
index 3509fecc88..68c6db3a2f 100644
--- a/mayan/apps/authentication/forms.py
+++ b/mayan/apps/authentication/forms.py
@@ -13,10 +13,12 @@ class EmailAuthenticationForm(forms.Form):
     """
     A form to use email address authentication
     """
-    email = forms.CharField(label=_('Email'), max_length=254,
-        widget=EmailInput()
+    email = forms.CharField(
+        label=_('Email'), max_length=254, widget=EmailInput()
+    )
+    password = forms.CharField(
+        label=_('Password'), widget=forms.PasswordInput
     )
-    password = forms.CharField(label=_('Password'), widget=forms.PasswordInput)
 
     error_messages = {
         'invalid_login': _('Please enter a correct email and password. '
diff --git a/mayan/apps/common/apps.py b/mayan/apps/common/apps.py
index b9646ad3be..8699a157e4 100644
--- a/mayan/apps/common/apps.py
+++ b/mayan/apps/common/apps.py
@@ -1,11 +1,10 @@
 from __future__ import absolute_import, unicode_literals
 
 import logging
-import tempfile
 
 from django import apps
 from django.conf import settings
-from django.conf.urls import include, patterns, url
+from django.conf.urls import include, url
 from django.contrib.auth.signals import user_logged_in
 from django.db.models.signals import post_migrate, post_save
 from django.utils.translation import ugettext_lazy as _
@@ -23,8 +22,6 @@ from .menus import (
     menu_facet, menu_main, menu_secondary, menu_setup, menu_tools
 )
 from .models import AnonymousUserSingleton
-from .settings import setting_temporary_directory
-from .utils import validate_path
 
 logger = logging.getLogger(__name__)
 
@@ -40,10 +37,9 @@ class MayanAppConfig(apps.AppConfig):
     def ready(self):
         from mayan.urls import urlpatterns
 
-
         if self.app_url:
             top_url = '{}/'.format(self.app_url)
-        elif not self.app_url is None:
+        elif self.app_url is not None:
             top_url = ''
         else:
             top_url = '{}/'.format(self.name)
@@ -77,7 +73,3 @@ class CommonApp(MayanAppConfig):
         post_migrate.connect(create_anonymous_user, dispatch_uid='create_anonymous_user', sender=self)
         user_logged_in.connect(user_locale_profile_session_config, dispatch_uid='user_locale_profile_session_config', sender=settings.AUTH_USER_MODEL)
         post_save.connect(user_locale_profile_create, dispatch_uid='user_locale_profile_create', sender=settings.AUTH_USER_MODEL)
-
-        # TODO: Create temp directory and update setting if /tmp not found/writable or value == None
-        #if (not validate_path(setting_temporary_directory.value)) or (not setting_temporary_directory.value):
-        #    setattr(common_settings, 'setting_temporary_directory.value', tempfile.mkdtemp())
diff --git a/mayan/apps/common/utils.py b/mayan/apps/common/utils.py
index 04e44f3316..70e22fb304 100644
--- a/mayan/apps/common/utils.py
+++ b/mayan/apps/common/utils.py
@@ -7,7 +7,6 @@ import types
 
 from django.conf import settings
 from django.contrib.auth.models import User
-from django.contrib.contenttypes.models import ContentType
 from django.utils.datastructures import MultiValueDict
 from django.utils.http import urlquote as django_urlquote
 from django.utils.http import urlencode as django_urlencode
diff --git a/mayan/apps/converter/classes.py b/mayan/apps/converter/classes.py
index f26a9f2d3b..a4d6825adc 100644
--- a/mayan/apps/converter/classes.py
+++ b/mayan/apps/converter/classes.py
@@ -73,6 +73,7 @@ CONVERTER_OFFICE_FILE_MIMETYPES = (
     'text/rtf',
 )
 
+
 class ConverterBase(object):
     @staticmethod
     def soffice(file_object):
diff --git a/mayan/apps/django_gpg/tests.py b/mayan/apps/django_gpg/tests.py
index 9a84454f92..f5c69070c4 100644
--- a/mayan/apps/django_gpg/tests.py
+++ b/mayan/apps/django_gpg/tests.py
@@ -2,7 +2,6 @@ from __future__ import unicode_literals
 
 import shutil
 
-from django.core.files.base import File
 from django.test import TestCase
 
 from .api import GPG, Key
diff --git a/mayan/apps/django_gpg/views.py b/mayan/apps/django_gpg/views.py
index 11527f5c5b..fea36f83ea 100644
--- a/mayan/apps/django_gpg/views.py
+++ b/mayan/apps/django_gpg/views.py
@@ -15,7 +15,6 @@ from common.utils import encapsulate
 from permissions.models import Permission
 
 from .api import Key
-from .exceptions import KeyImportError
 from .forms import KeySearchForm
 from .permissions import (
     PERMISSION_KEY_DELETE, PERMISSION_KEY_RECEIVE, PERMISSION_KEY_VIEW,
diff --git a/mayan/apps/documents/apps.py b/mayan/apps/documents/apps.py
index 5e016d1d90..ec0dc35920 100644
--- a/mayan/apps/documents/apps.py
+++ b/mayan/apps/documents/apps.py
@@ -1,7 +1,5 @@
 from __future__ import absolute_import, unicode_literals
 
-import tempfile
-
 from django.utils.translation import ugettext_lazy as _
 
 from actstream import registry
@@ -15,7 +13,7 @@ from common import (
 from common.api import register_maintenance_links
 from common.classes import ModelAttribute
 from common.signals import post_initial_setup
-from common.utils import encapsulate, validate_path
+from common.utils import encapsulate
 from converter.links import link_transformation_list
 from converter.permissions import (
     PERMISSION_TRANSFORMATION_CREATE,
@@ -74,10 +72,6 @@ class DocumentsApp(MayanAppConfig):
     def ready(self):
         super(DocumentsApp, self).ready()
 
-        # TODO: validate cache_path or create new
-        #if (not validate_path(document_settings.CACHE_PATH)) or (not document_settings.CACHE_PATH):
-        #    setattr(document_settings, 'CACHE_PATH', tempfile.mkdtemp())
-
         APIEndPoint('documents')
 
         MissingItem(label=_('Create a document type'), description=_('Every uploaded document must be assigned a document type, it is the basic way Mayan EDMS categorizes documents.'), condition=lambda: not DocumentType.objects.exists(), view='documents:document_type_list')
diff --git a/mayan/apps/documents/models.py b/mayan/apps/documents/models.py
index 47ed3fe8a5..dae7270d46 100644
--- a/mayan/apps/documents/models.py
+++ b/mayan/apps/documents/models.py
@@ -410,8 +410,6 @@ class DocumentVersion(models.Model):
             logger.debug('Intermidiate file "%s" found.', cache_filename)
 
             return open(cache_filename)
-            #converter = converter_class(file_object=open(cache_filename))
-            #converter.seek(0)
         else:
             logger.debug('Intermidiate file "%s" not found.', cache_filename)
 
@@ -539,7 +537,7 @@ class DocumentPage(models.Model):
                     file_object.write(page_image.getvalue())
             except Exception as exception:
                 # Cleanup in case of error
-                logger.error('Error creating page cache file "%s".', cache_filename)
+                logger.error('Error creating page cache file "%s"; %s', cache_filename, exception)
                 fs_cleanup(cache_filename)
                 raise
 
diff --git a/mayan/apps/documents/views.py b/mayan/apps/documents/views.py
index 362086947d..a0022c8b1c 100644
--- a/mayan/apps/documents/views.py
+++ b/mayan/apps/documents/views.py
@@ -21,8 +21,7 @@ from common.utils import encapsulate, pretty_size
 from common.views import ParentChildListView, SingleObjectListView
 from common.widgets import two_state_template
 from converter.literals import (
-    DEFAULT_FILE_FORMAT_MIMETYPE, DEFAULT_PAGE_NUMBER, DEFAULT_ROTATION,
-    DEFAULT_ZOOM_LEVEL
+    DEFAULT_PAGE_NUMBER, DEFAULT_ROTATION, DEFAULT_ZOOM_LEVEL
 )
 from converter.models import Transformation
 from converter.permissions import PERMISSION_TRANSFORMATION_DELETE
diff --git a/mayan/apps/events/models.py b/mayan/apps/events/models.py
index deb7694dfd..19f187d2e2 100644
--- a/mayan/apps/events/models.py
+++ b/mayan/apps/events/models.py
@@ -17,5 +17,3 @@ class EventType(models.Model):
     class Meta:
         verbose_name = _('Event type')
         verbose_name_plural = _('Event types')
-
-
diff --git a/mayan/apps/navigation/classes.py b/mayan/apps/navigation/classes.py
index df62d56a03..fe0c8e1793 100644
--- a/mayan/apps/navigation/classes.py
+++ b/mayan/apps/navigation/classes.py
@@ -236,18 +236,6 @@ class Link(object):
         return resolved_link
 
 
-class ModelListColumn(object):
-    _model_list_columns = {}
-
-    @classmethod
-    def get_model(cls, model):
-        return cls._model_list_columns.get(model)
-
-    def __init__(self, model, name, attribute):
-        self.__class__._model_list_columns.setdefault(model, [])
-        self.__class__._model_list_columns[model].extend(columns)
-
-
 class SourceColumn(object):
     _registry = {}
 
diff --git a/mayan/apps/navigation/forms.py b/mayan/apps/navigation/forms.py
index bd098de4f8..b2093e3a35 100644
--- a/mayan/apps/navigation/forms.py
+++ b/mayan/apps/navigation/forms.py
@@ -8,20 +8,7 @@ class MultiItemForm(forms.Form):
     def __init__(self, *args, **kwargs):
         actions = kwargs.pop('actions', [])
         super(MultiItemForm, self).__init__(*args, **kwargs)
-        choices = []
-        group = []
 
-        for action in actions:
-            if not action[0]:
-                if group:
-                    choices.append((link_spacer['text'], group))
-                group = []
-            else:
-                group.append(action)
-
-        if choices:
-            self.fields['action'].choices = choices
-        else:
-            self.fields['action'].choices = group
+        self.fields['action'].choices = actions
 
     action = forms.ChoiceField(label=_('Actions'), required=False)
diff --git a/mayan/apps/ocr/api.py b/mayan/apps/ocr/api.py
index 6cf9105815..726de49ea4 100644
--- a/mayan/apps/ocr/api.py
+++ b/mayan/apps/ocr/api.py
@@ -9,12 +9,8 @@ import sh
 from common.settings import setting_temporary_directory
 
 from .exceptions import UnpaperError
-from .literals import (
-    DEFAULT_OCR_FILE_EXTENSION, DEFAULT_OCR_FILE_FORMAT, UNPAPER_FILE_FORMAT
-)
 from .parsers import parse_document_page
 from .parsers.exceptions import ParserError, ParserUnknownFile
-from .runtime import ocr_backend
 from .settings import UNPAPER_PATH
 
 logger = logging.getLogger(__name__)
diff --git a/mayan/apps/ocr/apps.py b/mayan/apps/ocr/apps.py
index 84bfde59f3..8edc0c35a5 100644
--- a/mayan/apps/ocr/apps.py
+++ b/mayan/apps/ocr/apps.py
@@ -28,10 +28,7 @@ from .links import (
     link_entry_re_queue, link_entry_re_queue_multiple
 )
 from .models import DocumentVersionOCRError
-from .permissions import (
-    PERMISSION_OCR_DOCUMENT, PERMISSION_OCR_CONTENT_VIEW,
-    PERMISSION_DOCUMENT_TYPE_OCR_SETUP
-)
+from .permissions import PERMISSION_OCR_DOCUMENT, PERMISSION_OCR_CONTENT_VIEW
 from .settings import setting_pdftotext_path, setting_tesseract_path, setting_unpaper_path
 from .tasks import task_do_ocr
 
diff --git a/mayan/apps/ocr/backends/__init__.py b/mayan/apps/ocr/backends/__init__.py
index 8b13789179..e69de29bb2 100644
--- a/mayan/apps/ocr/backends/__init__.py
+++ b/mayan/apps/ocr/backends/__init__.py
@@ -1 +0,0 @@
-
diff --git a/mayan/apps/ocr/classes.py b/mayan/apps/ocr/classes.py
index ea877ef606..3e8165cf33 100644
--- a/mayan/apps/ocr/classes.py
+++ b/mayan/apps/ocr/classes.py
@@ -4,9 +4,6 @@ import logging
 
 from converter import converter_class
 
-from .literals import (
-    DEFAULT_OCR_FILE_EXTENSION, DEFAULT_OCR_FILE_FORMAT, UNPAPER_FILE_FORMAT
-)
 from .models import DocumentPageContent
 from .parsers import parse_document_page
 from .parsers.exceptions import ParserError, ParserUnknownFile
@@ -25,7 +22,7 @@ class OCRBackendBase(object):
             image = page.get_image()
             logger.info('Processing page: %d of document version: %s', page.page_number, document_version)
             document_page_content, created = DocumentPageContent.objects.get_or_create(document_page=page)
-            result =  self.execute(file_object=image, language=language)
+            result = self.execute(file_object=image, language=language)
             document_page_content.content = self.execute(file_object=image, language=language)
             document_page_content.save()
             image.close()
diff --git a/mayan/apps/ocr/literals.py b/mayan/apps/ocr/literals.py
index 3a7b1360dc..86881c7d23 100644
--- a/mayan/apps/ocr/literals.py
+++ b/mayan/apps/ocr/literals.py
@@ -1,6 +1,3 @@
 from __future__ import unicode_literals
 
-DEFAULT_OCR_FILE_FORMAT = 'tiff'
-DEFAULT_OCR_FILE_EXTENSION = 'tif'
 LOCK_EXPIRE = 60 * 10  # Adjust to worst case scenario
-UNPAPER_FILE_FORMAT = 'ppm'
diff --git a/mayan/apps/user_management/views.py b/mayan/apps/user_management/views.py
index 798302d028..f647028943 100644
--- a/mayan/apps/user_management/views.py
+++ b/mayan/apps/user_management/views.py
@@ -228,8 +228,8 @@ class UserGroupsView(AssignRemoveView):
     def dispatch(self, request, *args, **kwargs):
         Permission.objects.check_permissions(request.user, [PERMISSION_USER_EDIT])
         self.user = get_object_or_404(User, pk=self.kwargs['user_id'])
-        self.left_list_title=_('Non groups of user: %s') % self.user
-        self.right_list_title=_('Groups of user: %s') % self.user
+        self.left_list_title = _('Non groups of user: %s') % self.user
+        self.right_list_title = _('Groups of user: %s') % self.user
 
         return super(UserGroupsView, self).dispatch(request, *args, **kwargs)
 
diff --git a/mayan/settings/development.py b/mayan/settings/development.py
index 705b2b5667..e6c99d5578 100644
--- a/mayan/settings/development.py
+++ b/mayan/settings/development.py
@@ -34,22 +34,22 @@ LOGGING = {
         },
     },
     'handlers': {
-        'console':{
-            'level':'DEBUG',
-            'class':'logging.StreamHandler',
+        'console': {
+            'level': 'DEBUG',
+            'class': 'logging.StreamHandler',
             'formatter': 'intermediate'
         }
     },
     'loggers': {
         'documents': {
-            'handlers':['console'],
+            'handlers': ['console'],
             'propagate': True,
-            'level':'DEBUG',
+            'level': 'DEBUG',
         },
         'common': {
-            'handlers':['console'],
+            'handlers': ['console'],
             'propagate': True,
-            'level':'DEBUG',
+            'level': 'DEBUG',
         },
     }
 }