diff --git a/mayan/apps/common/forms.py b/mayan/apps/common/forms.py
index f1f89536e3..75cb277143 100644
--- a/mayan/apps/common/forms.py
+++ b/mayan/apps/common/forms.py
@@ -12,8 +12,7 @@ from django.utils.html import escape
 from django.utils.translation import ugettext_lazy as _
 
 from .utils import return_attrib
-from .widgets import (DetailSelectMultiple, PlainWidget, TextAreaDiv,
-    EmailInput)
+from .widgets import DetailSelectMultiple, PlainWidget, EmailInput
 
 
 class DetailForm(forms.ModelForm):
diff --git a/mayan/apps/common/templatetags/autoadmin_tags.py b/mayan/apps/common/templatetags/autoadmin_tags.py
index 1170d686f6..ee602a781a 100644
--- a/mayan/apps/common/templatetags/autoadmin_tags.py
+++ b/mayan/apps/common/templatetags/autoadmin_tags.py
@@ -1,5 +1,4 @@
 from django.template import Library
-from django.utils.importlib import import_module
 
 from common.models import AutoAdminSingleton
 
diff --git a/mayan/apps/django_gpg/__init__.py b/mayan/apps/django_gpg/__init__.py
index b5c1a815b4..962788314c 100644
--- a/mayan/apps/django_gpg/__init__.py
+++ b/mayan/apps/django_gpg/__init__.py
@@ -6,8 +6,8 @@ from navigation.api import register_links
 from project_setup.api import register_setup
 
 from .api import Key
-from .links import (private_keys, public_keys, key_delete, key_query,
-    key_receive, key_setup)
+from .links import (public_keys, key_delete, key_query, key_receive,
+    key_setup)
 
 # register_links(['key_delete', 'key_private_list', 'key_public_list', 'key_query'], [private_keys, public_keys, key_query], menu_name='sidebar')
 register_links(['key_delete', 'key_public_list', 'key_query'], [public_keys, key_query], menu_name='sidebar')
diff --git a/mayan/apps/document_acls/views.py b/mayan/apps/document_acls/views.py
index 5938fec434..99da50769c 100644
--- a/mayan/apps/document_acls/views.py
+++ b/mayan/apps/document_acls/views.py
@@ -1,8 +1,7 @@
 from django.shortcuts import get_object_or_404
-from django.utils.translation import ugettext_lazy as _
 
-from documents.models import Document
 from acls.views import acl_list_for
+from documents.models import Document
 
 
 def document_acl_list(request, document_id):
diff --git a/mayan/apps/document_signatures/tests.py b/mayan/apps/document_signatures/tests.py
index 3fb8dc2024..2aed00419d 100644
--- a/mayan/apps/document_signatures/tests.py
+++ b/mayan/apps/document_signatures/tests.py
@@ -2,13 +2,12 @@ from __future__ import absolute_import
 
 import os
 
-from django.utils import unittest
 from django.conf import settings
 from django.core.files.base import File
+from django.utils import unittest
 
-from django_gpg.api import SIGNATURE_STATE_VALID
-from documents.models import Document, DocumentType
 from documents.literals import VERSION_UPDATE_MAJOR, RELEASE_LEVEL_FINAL
+from documents.models import Document, DocumentType
 
 from .models import DocumentVersionSignature
 
diff --git a/mayan/apps/documents/__init__.py b/mayan/apps/documents/__init__.py
index 9f5d69f617..1916554488 100644
--- a/mayan/apps/documents/__init__.py
+++ b/mayan/apps/documents/__init__.py
@@ -92,7 +92,8 @@ register_diagnostic('documents', _(u'Documents'), document_missing_list)
 register_maintenance_links([document_find_all_duplicates, document_update_page_count, document_clear_image_cache], namespace='documents', title=_(u'documents'))
 
 register_model_list_columns(Document, [
-        {'name': _(u'thumbnail'), 'attribute':
+        {
+            'name': _(u'thumbnail'), 'attribute':
             encapsulate(lambda x: document_thumbnail(x))
         },
     ])
diff --git a/mayan/apps/documents/migrations/0001_initial.py b/mayan/apps/documents/migrations/0001_initial.py
index c50a63a10f..75ee136945 100644
--- a/mayan/apps/documents/migrations/0001_initial.py
+++ b/mayan/apps/documents/migrations/0001_initial.py
@@ -1,13 +1,12 @@
 # encoding: utf-8
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Adding model 'DocumentType'
         db.create_table('documents_documenttype', (
             ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
@@ -70,9 +69,7 @@ class Migration(SchemaMigration):
         ))
         db.send_create_signal('documents', ['RecentDocument'])
 
-
     def backwards(self, orm):
-        
         # Deleting model 'DocumentType'
         db.delete_table('documents_documenttype')
 
@@ -91,7 +88,6 @@ class Migration(SchemaMigration):
         # Deleting model 'RecentDocument'
         db.delete_table('documents_recentdocument')
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0002_filename_extension_merge.py b/mayan/apps/documents/migrations/0002_filename_extension_merge.py
index 976a9452cd..0d0c82586a 100644
--- a/mayan/apps/documents/migrations/0002_filename_extension_merge.py
+++ b/mayan/apps/documents/migrations/0002_filename_extension_merge.py
@@ -1,10 +1,10 @@
 # encoding: utf-8
 import os
-import datetime
 from south.db import db
 from south.v2 import DataMigration
 from django.db import models
 
+
 class Migration(DataMigration):
 
     def forwards(self, orm):
@@ -18,7 +18,7 @@ class Migration(DataMigration):
         for document in orm.Document.objects.all():
             document.file_filename, document.file_extension = document.file_filename.split(os.extsep)
             document.save()
-            
+
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0003_auto__del_field_document_file_extension.py b/mayan/apps/documents/migrations/0003_auto__del_field_document_file_extension.py
index f5ac51cb3e..19c01cdb1c 100644
--- a/mayan/apps/documents/migrations/0003_auto__del_field_document_file_extension.py
+++ b/mayan/apps/documents/migrations/0003_auto__del_field_document_file_extension.py
@@ -4,20 +4,17 @@ from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Deleting field 'Document.file_extension'
         db.delete_column('documents_document', 'file_extension')
 
-
     def backwards(self, orm):
-        
         # Adding field 'Document.file_extension'
         db.add_column('documents_document', 'file_extension', self.gf('django.db.models.fields.CharField')(default=u'', max_length=16, db_index=True), keep_default=False)
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0004_auto__add_documentversion__add_unique_documentversion_document_mayor_m.py b/mayan/apps/documents/migrations/0004_auto__add_documentversion__add_unique_documentversion_document_mayor_m.py
index 60ce9a9f3a..386f12eb68 100644
--- a/mayan/apps/documents/migrations/0004_auto__add_documentversion__add_unique_documentversion_document_mayor_m.py
+++ b/mayan/apps/documents/migrations/0004_auto__add_documentversion__add_unique_documentversion_document_mayor_m.py
@@ -1,13 +1,12 @@
 # encoding: utf-8
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Adding model 'DocumentVersion'
         db.create_table('documents_documentversion', (
             ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
@@ -32,9 +31,7 @@ class Migration(SchemaMigration):
         # Adding field 'DocumentPage.document_version'
         db.add_column('documents_documentpage', 'document_version', self.gf('django.db.models.fields.related.ForeignKey')(to=orm['documents.DocumentVersion'], null=True, blank=True), keep_default=False)
 
-
     def backwards(self, orm):
-        
         # Removing unique constraint on 'DocumentVersion', fields ['document', 'mayor', 'minor', 'micro', 'release_level', 'serial']
         db.delete_unique('documents_documentversion', ['document_id', 'mayor', 'minor', 'micro', 'release_level', 'serial'])
 
@@ -44,7 +41,6 @@ class Migration(SchemaMigration):
         # Deleting field 'DocumentPage.document_version'
         db.delete_column('documents_documentpage', 'document_version_id')
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0005_document_versions.py b/mayan/apps/documents/migrations/0005_document_versions.py
index 2499097e19..f68ac355bc 100644
--- a/mayan/apps/documents/migrations/0005_document_versions.py
+++ b/mayan/apps/documents/migrations/0005_document_versions.py
@@ -1,21 +1,20 @@
 # encoding: utf-8
-import datetime
-from south.db import db
 from south.v2 import DataMigration
 from django.db import models
 
+
 class Migration(DataMigration):
 
     def forwards(self, orm):
         for document in orm.Document.objects.all():
             document_version = document.versions.create(
-                document = document,
-                timestamp = document.date_added,
-                file = document.file,
-                mimetype = document.file_mimetype,
-                encoding = document.file_mime_encoding,
-                filename = document.file_filename,
-                checksum = document.checksum,
+                document=document,
+                timestamp=document.date_added,
+                file=document.file,
+                mimetype=document.file_mimetype,
+                encoding=document.file_mime_encoding,
+                filename=document.file_filename,
+                checksum=document.checksum,
             )
             document_version.save()
             for document_page in document.pages.all():
diff --git a/mayan/apps/documents/migrations/0006_fix_invalid_document_version_id_keys.py b/mayan/apps/documents/migrations/0006_fix_invalid_document_version_id_keys.py
index 0cdd0a2b52..38cab842f8 100644
--- a/mayan/apps/documents/migrations/0006_fix_invalid_document_version_id_keys.py
+++ b/mayan/apps/documents/migrations/0006_fix_invalid_document_version_id_keys.py
@@ -1,9 +1,8 @@
 # encoding: utf-8
-import datetime
-from south.db import db
 from south.v2 import DataMigration
 from django.db import models
 
+
 class Migration(DataMigration):
 
     def forwards(self, orm):
diff --git a/mayan/apps/documents/migrations/0007_remove_old_file_fields.py b/mayan/apps/documents/migrations/0007_remove_old_file_fields.py
index 9c84b2f93d..cefb4900ba 100644
--- a/mayan/apps/documents/migrations/0007_remove_old_file_fields.py
+++ b/mayan/apps/documents/migrations/0007_remove_old_file_fields.py
@@ -4,10 +4,10 @@ from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Changing field 'DocumentVersion.document'
         db.alter_column('documents_documentversion', 'document_id', self.gf('django.db.models.fields.related.ForeignKey')(to=orm['documents.Document']))
 
@@ -35,9 +35,7 @@ class Migration(SchemaMigration):
         # Changing field 'DocumentPage.document_version'
         db.alter_column('documents_documentpage', 'document_version_id', self.gf('django.db.models.fields.related.ForeignKey')(to=orm['documents.DocumentVersion']))
 
-
     def backwards(self, orm):
-        
         # Changing field 'DocumentVersion.document'
         db.alter_column('documents_documentversion', 'document_id', self.gf('django.db.models.fields.related.ForeignKey')(to=orm['documents.Document'], null=True))
 
@@ -65,7 +63,6 @@ class Migration(SchemaMigration):
         # Changing field 'DocumentPage.document_version'
         db.alter_column('documents_documentpage', 'document_version_id', self.gf('django.db.models.fields.related.ForeignKey')(to=orm['documents.DocumentVersion'], null=True))
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0008_fix_mayor_field_name.py b/mayan/apps/documents/migrations/0008_fix_mayor_field_name.py
index 17f9fa483f..c4e9335cb3 100644
--- a/mayan/apps/documents/migrations/0008_fix_mayor_field_name.py
+++ b/mayan/apps/documents/migrations/0008_fix_mayor_field_name.py
@@ -1,13 +1,12 @@
 # encoding: utf-8
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Removing unique constraint on 'DocumentVersion', fields ['release_level', 'micro', 'serial', 'document', 'mayor', 'minor']
         db.delete_unique('documents_documentversion', ['release_level', 'micro', 'serial', 'document_id', 'mayor', 'minor'])
 
@@ -20,9 +19,7 @@ class Migration(SchemaMigration):
         # Adding unique constraint on 'DocumentVersion', fields ['major', 'release_level', 'micro', 'serial', 'document', 'minor']
         db.create_unique('documents_documentversion', ['major', 'release_level', 'micro', 'serial', 'document_id', 'minor'])
 
-
     def backwards(self, orm):
-        
         # Removing unique constraint on 'DocumentVersion', fields ['major', 'release_level', 'micro', 'serial', 'document', 'minor']
         db.delete_unique('documents_documentversion', ['major', 'release_level', 'micro', 'serial', 'document_id', 'minor'])
 
@@ -35,7 +32,6 @@ class Migration(SchemaMigration):
         # Adding unique constraint on 'DocumentVersion', fields ['release_level', 'micro', 'serial', 'document', 'mayor', 'minor']
         db.create_unique('documents_documentversion', ['release_level', 'micro', 'serial', 'document_id', 'mayor', 'minor'])
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0009_add_comment_field.py b/mayan/apps/documents/migrations/0009_add_comment_field.py
index 51a3b16790..4dd4503a1f 100644
--- a/mayan/apps/documents/migrations/0009_add_comment_field.py
+++ b/mayan/apps/documents/migrations/0009_add_comment_field.py
@@ -4,20 +4,17 @@ from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Adding field 'DocumentVersion.comment'
         db.add_column('documents_documentversion', 'comment', self.gf('django.db.models.fields.TextField')(default='', blank=True), keep_default=False)
 
-
     def backwards(self, orm):
-        
         # Deleting field 'DocumentVersion.comment'
         db.delete_column('documents_documentversion', 'comment')
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0010_auto__chg_field_document_date_added.py b/mayan/apps/documents/migrations/0010_auto__chg_field_document_date_added.py
index 3408618acf..336932c184 100644
--- a/mayan/apps/documents/migrations/0010_auto__chg_field_document_date_added.py
+++ b/mayan/apps/documents/migrations/0010_auto__chg_field_document_date_added.py
@@ -4,20 +4,17 @@ from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Changing field 'Document.date_added'
         db.alter_column('documents_document', 'date_added', self.gf('django.db.models.fields.DateTimeField')())
 
-
     def backwards(self, orm):
-        
         # Changing field 'Document.date_added'
         db.alter_column('documents_document', 'date_added', self.gf('django.db.models.fields.DateTimeField')(auto_now_add=True))
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0011_auto__add_field_documentversion_signature_state.py b/mayan/apps/documents/migrations/0011_auto__add_field_documentversion_signature_state.py
index d58503615d..f0860aa793 100644
--- a/mayan/apps/documents/migrations/0011_auto__add_field_documentversion_signature_state.py
+++ b/mayan/apps/documents/migrations/0011_auto__add_field_documentversion_signature_state.py
@@ -4,20 +4,17 @@ from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Adding field 'DocumentVersion.signature_state'
         db.add_column('documents_documentversion', 'signature_state', self.gf('django.db.models.fields.CharField')(max_length=16, null=True, blank=True), keep_default=False)
 
-
     def backwards(self, orm):
-        
         # Deleting field 'DocumentVersion.signature_state'
         db.delete_column('documents_documentversion', 'signature_state')
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0012_auto__add_field_documentversion_signature_file.py b/mayan/apps/documents/migrations/0012_auto__add_field_documentversion_signature_file.py
index 08aff6d53d..fab669d478 100644
--- a/mayan/apps/documents/migrations/0012_auto__add_field_documentversion_signature_file.py
+++ b/mayan/apps/documents/migrations/0012_auto__add_field_documentversion_signature_file.py
@@ -1,23 +1,19 @@
 # encoding: utf-8
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Adding field 'DocumentVersion.signature_file'
         db.add_column('documents_documentversion', 'signature_file', self.gf('django.db.models.fields.files.FileField')(max_length=100, null=True, blank=True), keep_default=False)
 
-
     def backwards(self, orm):
-        
         # Deleting field 'DocumentVersion.signature_file'
         db.delete_column('documents_documentversion', 'signature_file')
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0013_auto__del_field_documentversion_signature_file__del_field_documentvers.py b/mayan/apps/documents/migrations/0013_auto__del_field_documentversion_signature_file__del_field_documentvers.py
index c656de35ed..36777ce5bf 100644
--- a/mayan/apps/documents/migrations/0013_auto__del_field_documentversion_signature_file__del_field_documentvers.py
+++ b/mayan/apps/documents/migrations/0013_auto__del_field_documentversion_signature_file__del_field_documentvers.py
@@ -1,33 +1,29 @@
 # encoding: utf-8
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
-    
+
     depends_on = (
         ('document_signatures', '0002_move_signatures_to_new_app'),
-    )    
+    )
 
     def forwards(self, orm):
-        
         # Deleting field 'DocumentVersion.signature_file'
         db.delete_column('documents_documentversion', 'signature_file')
 
         # Deleting field 'DocumentVersion.signature_state'
         db.delete_column('documents_documentversion', 'signature_state')
 
-
     def backwards(self, orm):
-        
         # Adding field 'DocumentVersion.signature_file'
         db.add_column('documents_documentversion', 'signature_file', self.gf('django.db.models.fields.files.FileField')(max_length=100, null=True, blank=True), keep_default=False)
 
         # Adding field 'DocumentVersion.signature_state'
         db.add_column('documents_documentversion', 'signature_state', self.gf('django.db.models.fields.CharField')(max_length=16, null=True, blank=True), keep_default=False)
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/documents/migrations/0014_change_document_mimetype_encoding_null.py b/mayan/apps/documents/migrations/0014_change_document_mimetype_encoding_null.py
index 57288c6aa8..f8a3074adc 100644
--- a/mayan/apps/documents/migrations/0014_change_document_mimetype_encoding_null.py
+++ b/mayan/apps/documents/migrations/0014_change_document_mimetype_encoding_null.py
@@ -8,7 +8,6 @@ from django.db import models
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-
         # Changing field 'DocumentVersion.mimetype'
         db.alter_column('documents_documentversion', 'mimetype', self.gf('django.db.models.fields.CharField')(max_length=64, null=True))
 
@@ -16,7 +15,6 @@ class Migration(SchemaMigration):
         db.alter_column('documents_documentversion', 'encoding', self.gf('django.db.models.fields.CharField')(max_length=64, null=True))
 
     def backwards(self, orm):
-
         # Changing field 'DocumentVersion.mimetype'
         db.alter_column('documents_documentversion', 'mimetype', self.gf('django.db.models.fields.CharField')(max_length=64))
 
@@ -157,4 +155,4 @@ class Migration(SchemaMigration):
         }
     }
 
-    complete_apps = ['documents']
\ No newline at end of file
+    complete_apps = ['documents']
diff --git a/mayan/apps/documents/migrations/0015_auto__add_unique_documenttype_name.py b/mayan/apps/documents/migrations/0015_auto__add_unique_documenttype_name.py
index 96eaf65cf3..d4a57a4ac8 100644
--- a/mayan/apps/documents/migrations/0015_auto__add_unique_documenttype_name.py
+++ b/mayan/apps/documents/migrations/0015_auto__add_unique_documenttype_name.py
@@ -11,12 +11,10 @@ class Migration(SchemaMigration):
         # Adding unique constraint on 'DocumentType', fields ['name']
         db.create_unique('documents_documenttype', ['name'])
 
-
     def backwards(self, orm):
         # Removing unique constraint on 'DocumentType', fields ['name']
         db.delete_unique('documents_documenttype', ['name'])
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
@@ -151,4 +149,4 @@ class Migration(SchemaMigration):
         }
     }
 
-    complete_apps = ['documents']
\ No newline at end of file
+    complete_apps = ['documents']
diff --git a/mayan/apps/documents/migrations/0017_auto__chg_field_documentversion_mimetype.py b/mayan/apps/documents/migrations/0017_auto__chg_field_documentversion_mimetype.py
index 678dd43451..e2ed2a5438 100644
--- a/mayan/apps/documents/migrations/0017_auto__chg_field_documentversion_mimetype.py
+++ b/mayan/apps/documents/migrations/0017_auto__chg_field_documentversion_mimetype.py
@@ -8,12 +8,10 @@ from django.db import models
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-
         # Changing field 'DocumentVersion.mimetype'
         db.alter_column('documents_documentversion', 'mimetype', self.gf('django.db.models.fields.CharField')(max_length=255, null=True))
 
     def backwards(self, orm):
-
         # Changing field 'DocumentVersion.mimetype'
         db.alter_column('documents_documentversion', 'mimetype', self.gf('django.db.models.fields.CharField')(max_length=64, null=True))
 
@@ -151,4 +149,4 @@ class Migration(SchemaMigration):
         }
     }
 
-    complete_apps = ['documents']
\ No newline at end of file
+    complete_apps = ['documents']
diff --git a/mayan/apps/documents/templatetags/printing_tags.py b/mayan/apps/documents/templatetags/printing_tags.py
index 7dccae8085..dc0ae08827 100644
--- a/mayan/apps/documents/templatetags/printing_tags.py
+++ b/mayan/apps/documents/templatetags/printing_tags.py
@@ -2,8 +2,6 @@ from django.template import Library, Node, Variable
 
 from converter.api import get_dimensions
 
-from documents.conf.settings import PRINT_SIZE
-
 register = Library()
 
 
diff --git a/mayan/apps/dynamic_search/__init__.py b/mayan/apps/dynamic_search/__init__.py
index 3c38a29acf..ba9af28e2e 100644
--- a/mayan/apps/dynamic_search/__init__.py
+++ b/mayan/apps/dynamic_search/__init__.py
@@ -1,7 +1,5 @@
 from __future__ import absolute_import
 
-from django.utils.translation import ugettext_lazy as _
-
 from navigation.api import register_sidebar_template, register_links
 
 from .links import search, search_advanced, search_again
diff --git a/mayan/apps/dynamic_search/classes.py b/mayan/apps/dynamic_search/classes.py
index f96ec6bed7..fb558dc81a 100644
--- a/mayan/apps/dynamic_search/classes.py
+++ b/mayan/apps/dynamic_search/classes.py
@@ -1,9 +1,8 @@
 from __future__ import absolute_import
 
-import re
-import types
-import logging
 import datetime
+import logging
+import re
 
 from django.db.models import Q
 from django.db.models.loading import get_model
@@ -37,7 +36,7 @@ class SearchModel(object):
 
     def get_all_search_fields(self):
         return self.search_fields.values()
-        
+
     def get_search_field(self, full_name):
         return self.search_fields[full_name]
 
@@ -57,7 +56,7 @@ class SearchModel(object):
         """
         search_field = SearchField(self, *args, **kwargs)
         self.search_fields[search_field.get_full_name()] = search_field
-    
+
     def add_related_field(self, *args, **kwargs):
         """
         Add a search field that will search content in a related field in
@@ -92,15 +91,15 @@ class SearchModel(object):
                     'field_name': [search_field.field],
                     'terms': self.normalize_query(query_string)
                 }
-            )        
-        
+            )
+
         logger.debug('search_dict: %s' % search_dict)
 
         return self.execute_search(search_dict, global_and_search=False)
 
     def advanced_search(self, dictionary):
         search_dict = {}
-        
+
         for key, value in dictionary.items():
             logger.debug('key: %s' % key)
             logger.debug('value: %s' % value)
@@ -118,7 +117,7 @@ class SearchModel(object):
                         'field_name': [search_field.field],
                         'terms': self.normalize_query(value)
                     }
-                )  
+                )
 
 
         logger.debug('search_dict: %s' % search_dict)
@@ -147,12 +146,12 @@ class SearchModel(object):
 
                 # Initialize per field result set
                 field_result_set = set()
-               
+
                 # Get results per search field
                 for query in field_query_list:
                     logger.debug('query: %s' % query)
                     term_query_result_set = set(model.objects.filter(query).values_list(data['return_value'], flat=True))
-                
+
                     # Convert the QuerySet to a Python set and perform the
                     # AND operation on the program and not as a query.
                     # This operation ANDs all the field term results
@@ -174,7 +173,7 @@ class SearchModel(object):
                         model_result_set &= field_result_set
                 else:
                     model_result_set |= field_result_set
-                    
+
                 logger.debug('model_result_set: %s' % model_result_set)
 
             # Update the search result total count
@@ -192,7 +191,7 @@ class SearchModel(object):
                 for result in results:
                     if result not in flat_list:
                         flat_list.append(result)
-            
+
             logger.debug('model_list: %s' % model_list)
             logger.debug('flat_list: %s' % flat_list)
 
diff --git a/mayan/apps/dynamic_search/views.py b/mayan/apps/dynamic_search/views.py
index 4d38879ca4..62870dfe99 100644
--- a/mayan/apps/dynamic_search/views.py
+++ b/mayan/apps/dynamic_search/views.py
@@ -1,22 +1,18 @@
 from __future__ import absolute_import
 
-import urlparse
 import logging
+import urlparse
 
+from django.core.urlresolvers import reverse
+from django.http import HttpResponseRedirect
 from django.shortcuts import render_to_response
 from django.template import RequestContext
 from django.utils.translation import ugettext_lazy as _
-from django.contrib import messages
-from django.conf import settings
-from django.http import HttpResponseRedirect
-from django.core.urlresolvers import reverse
-from django.utils.http import urlencode
 
-from .conf.settings import SHOW_OBJECT_TYPE
-from .conf.settings import LIMIT
+from .classes import SearchModel
+from .conf.settings import LIMIT, SHOW_OBJECT_TYPE
 from .forms import SearchForm, AdvancedSearchForm
 from .models import RecentSearch
-from .classes import SearchModel
 
 logger = logging.getLogger(__name__)
 document_search = SearchModel.get('documents.Document')
@@ -44,22 +40,22 @@ def results(request, extra_context=None):
             # Advanced search
             logger.debug('advanced search')
             model_list, flat_list, shown_result_count, result_count, elapsed_time = document_search.advanced_search(request.GET)
-            
+
         if shown_result_count != result_count:
             title = _(u'results, (showing only %(shown_result_count)s out of %(result_count)s)') % {
                 'shown_result_count': shown_result_count,
                 'result_count': result_count}
-                
+
         else:
             title = _(u'results')
-        
+
         # Update the context with the search results
         context.update({
             'found_entries': model_list,
             'object_list': flat_list,
             'title': title,
             'time_delta': elapsed_time,
-        })            
+        })
 
         RecentSearch.objects.add_query_for_user(request.user, request.GET, result_count)
 
diff --git a/mayan/apps/folders/__init__.py b/mayan/apps/folders/__init__.py
index 25590f1820..3aa57639d0 100644
--- a/mayan/apps/folders/__init__.py
+++ b/mayan/apps/folders/__init__.py
@@ -1,11 +1,8 @@
 from __future__ import absolute_import
 
-from django.utils.translation import ugettext_lazy as _
-
 from acls.api import class_permissions
 from acls.permissions import ACLS_EDIT_ACL, ACLS_VIEW_ACL
 from documents.models import Document
-from documents.permissions import PERMISSION_DOCUMENT_VIEW
 from navigation.api import (register_links, register_top_menu,
     register_multi_item_links, register_sidebar_template)
 
@@ -14,10 +11,9 @@ from .links import (folder_list, folder_create, folder_edit, folder_delete,
     folder_add_multiple_documents, document_folder_list, folder_acl_list,
     folders_main_menu_link)
 from .models import Folder
-from .permissions import (PERMISSION_FOLDER_CREATE,
-    PERMISSION_FOLDER_EDIT, PERMISSION_FOLDER_DELETE,
-    PERMISSION_FOLDER_REMOVE_DOCUMENT, PERMISSION_FOLDER_VIEW,
-    PERMISSION_FOLDER_ADD_DOCUMENT)
+from .permissions import (PERMISSION_FOLDER_EDIT,
+    PERMISSION_FOLDER_DELETE, PERMISSION_FOLDER_REMOVE_DOCUMENT,
+    PERMISSION_FOLDER_VIEW, PERMISSION_FOLDER_ADD_DOCUMENT)
 
 register_multi_item_links(['folder_view'], [folder_document_multiple_remove])
 
diff --git a/mayan/apps/folders/links.py b/mayan/apps/folders/links.py
index 80b585ae3f..fd8e1d6aff 100644
--- a/mayan/apps/folders/links.py
+++ b/mayan/apps/folders/links.py
@@ -2,7 +2,7 @@ from __future__ import absolute_import
 
 from django.utils.translation import ugettext_lazy as _
 
-from acls.permissions import ACLS_EDIT_ACL, ACLS_VIEW_ACL
+from acls.permissions import ACLS_VIEW_ACL
 from documents.permissions import PERMISSION_DOCUMENT_VIEW
 
 from .permissions import (PERMISSION_FOLDER_CREATE,
diff --git a/mayan/apps/folders/tests.py b/mayan/apps/folders/tests.py
index 0e743d4753..29a6bf136b 100644
--- a/mayan/apps/folders/tests.py
+++ b/mayan/apps/folders/tests.py
@@ -2,12 +2,11 @@ from __future__ import absolute_import
 
 import os
 
-from django.utils import unittest
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.core.files.base import File
+from django.utils import unittest
 
-from documents.literals import VERSION_UPDATE_MAJOR, RELEASE_LEVEL_FINAL
 from documents.models import Document, DocumentType
 
 from .models import Folder
diff --git a/mayan/apps/history/__init__.py b/mayan/apps/history/__init__.py
index 8bcb3b1d98..a8f34db86c 100644
--- a/mayan/apps/history/__init__.py
+++ b/mayan/apps/history/__init__.py
@@ -7,9 +7,9 @@ from navigation.api import register_model_list_columns, register_links
 from common.utils import encapsulate
 
 from .models import History
-from .widgets import history_entry_summary, history_entry_type_link
+from .widgets import history_entry_type_link
 from .links import history_list, history_details
-    
+
 register_tool(history_list)
 
 register_model_list_columns(History, [
@@ -24,7 +24,7 @@ register_model_list_columns(History, [
     {
         'name': _(u'summary'),
         'attribute': encapsulate(lambda entry: unicode(entry.get_processed_summary()))
-    }    
+    }
 ])
 
 register_links(History, [history_details])
diff --git a/mayan/apps/history/managers.py b/mayan/apps/history/managers.py
index 7975c06a6a..3d69e7deaa 100644
--- a/mayan/apps/history/managers.py
+++ b/mayan/apps/history/managers.py
@@ -1,7 +1,6 @@
-from django.db import models
 from django.contrib.contenttypes.models import ContentType
 from django.core.urlresolvers import reverse
-#from django.shortcuts import get_object_or_404
+from django.db import models
 
 
 class ObjectHistoryManager(models.Manager):
diff --git a/mayan/apps/installation/__init__.py b/mayan/apps/installation/__init__.py
index 1e2fb1f209..3f839198b3 100644
--- a/mayan/apps/installation/__init__.py
+++ b/mayan/apps/installation/__init__.py
@@ -1,7 +1,6 @@
 from __future__ import absolute_import
 
 from django.db import transaction
-from django.db.models.signals import post_save
 from django.db.utils import DatabaseError
 from django.dispatch import receiver
 from django.utils.translation import ugettext_lazy as _
diff --git a/mayan/apps/installation/migrations/0001_initial.py b/mayan/apps/installation/migrations/0001_initial.py
index 915b376e74..8c56a74e46 100644
--- a/mayan/apps/installation/migrations/0001_initial.py
+++ b/mayan/apps/installation/migrations/0001_initial.py
@@ -1,5 +1,4 @@
 # -*- coding: utf-8 -*-
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
@@ -17,12 +16,10 @@ class Migration(SchemaMigration):
         ))
         db.send_create_signal('installation', ['Installation'])
 
-
     def backwards(self, orm):
         # Deleting model 'Installation'
         db.delete_table('installation_installation')
 
-
     models = {
         'installation.installation': {
             'Meta': {'object_name': 'Installation'},
@@ -33,4 +30,4 @@ class Migration(SchemaMigration):
         }
     }
 
-    complete_apps = ['installation']
\ No newline at end of file
+    complete_apps = ['installation']
diff --git a/mayan/apps/installation/views.py b/mayan/apps/installation/views.py
index c09326f4d9..503c206737 100644
--- a/mayan/apps/installation/views.py
+++ b/mayan/apps/installation/views.py
@@ -17,7 +17,7 @@ def namespace_list(request):
     Installation().get_properties()
 
     return render_to_response('generic_list.html', {
-        'object_list':  PropertyNamespace.get_all(),
+        'object_list': PropertyNamespace.get_all(),
         'title': _(u'installation property namespaces'),
         'hide_object': True,
     }, context_instance=RequestContext(request))
diff --git a/mayan/apps/linking/forms.py b/mayan/apps/linking/forms.py
index 3a2fe31f07..17e08e6f2e 100644
--- a/mayan/apps/linking/forms.py
+++ b/mayan/apps/linking/forms.py
@@ -58,7 +58,8 @@ class SmartLinkImageWidget(forms.widgets.Widget):
         output.append(u'</div>')
         output.append(
             u'<br /><span class="famfam active famfam-magnifier"></span>%s' %
-             ugettext(u'Click on the image for full size view of the first page.'))
+             ugettext(u'Click on the image for full size view of the first page.')
+        )
 
         return mark_safe(u''.join(output))
 
diff --git a/mayan/apps/main/__init__.py b/mayan/apps/main/__init__.py
index f6d664c1c2..4fc64225c5 100644
--- a/mayan/apps/main/__init__.py
+++ b/mayan/apps/main/__init__.py
@@ -4,7 +4,6 @@ from django.utils.translation import ugettext_lazy as _
 from django.conf import settings
 
 from navigation.api import register_top_menu
-from navigation.api import register_links
 from project_setup.api import register_setup
 from project_tools.api import register_tool
 
diff --git a/mayan/apps/metadata/__init__.py b/mayan/apps/metadata/__init__.py
index 5460340676..d3f8b15dad 100644
--- a/mayan/apps/metadata/__init__.py
+++ b/mayan/apps/metadata/__init__.py
@@ -47,7 +47,7 @@ class_permissions(Document, [
 ])
 
 register_model_list_columns(Document, [
-        {'name': _(u'metadata'), 'attribute':
-            encapsulate(lambda x: get_metadata_string(x))
+        {
+            'name': _(u'metadata'), 'attribute': encapsulate(lambda x: get_metadata_string(x))
         },
     ])
diff --git a/mayan/apps/metadata/api.py b/mayan/apps/metadata/api.py
index e70b080cb2..49f47e4828 100644
--- a/mayan/apps/metadata/api.py
+++ b/mayan/apps/metadata/api.py
@@ -54,8 +54,7 @@ def save_metadata(metadata_dict, document, create=False):
             document=document,
             metadata_type=get_object_or_404(
                 MetadataType,
-                pk=metadata_dict['id']
-           ),
+                pk=metadata_dict['id'])
         )
     else:
         try:
diff --git a/mayan/apps/metadata/migrations/0001_initial.py b/mayan/apps/metadata/migrations/0001_initial.py
index ab66201dc3..d50a900fe0 100644
--- a/mayan/apps/metadata/migrations/0001_initial.py
+++ b/mayan/apps/metadata/migrations/0001_initial.py
@@ -1,5 +1,4 @@
 # -*- coding: utf-8 -*-
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
@@ -65,7 +64,6 @@ class Migration(SchemaMigration):
         ))
         db.create_unique('metadata_documenttypedefaults_default_metadata', ['documenttypedefaults_id', 'metadatatype_id'])
 
-
     def backwards(self, orm):
         # Deleting model 'MetadataType'
         db.delete_table('metadata_metadatatype')
@@ -88,7 +86,6 @@ class Migration(SchemaMigration):
         # Removing M2M table for field default_metadata on 'DocumentTypeDefaults'
         db.delete_table('metadata_documenttypedefaults_default_metadata')
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
diff --git a/mayan/apps/metadata/migrations/0002_auto__add_unique_metadataset_title.py b/mayan/apps/metadata/migrations/0002_auto__add_unique_metadataset_title.py
index ea09344767..81c8697ce6 100644
--- a/mayan/apps/metadata/migrations/0002_auto__add_unique_metadataset_title.py
+++ b/mayan/apps/metadata/migrations/0002_auto__add_unique_metadataset_title.py
@@ -1,5 +1,4 @@
 # -*- coding: utf-8 -*-
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
@@ -11,12 +10,10 @@ class Migration(SchemaMigration):
         # Adding unique constraint on 'MetadataSet', fields ['title']
         db.create_unique('metadata_metadataset', ['title'])
 
-
     def backwards(self, orm):
         # Removing unique constraint on 'MetadataSet', fields ['title']
         db.delete_unique('metadata_metadataset', ['title'])
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},
@@ -137,4 +134,4 @@ class Migration(SchemaMigration):
         }
     }
 
-    complete_apps = ['metadata']
\ No newline at end of file
+    complete_apps = ['metadata']
diff --git a/mayan/apps/metadata/migrations/0003_auto__chg_field_metadatatype_lookup.py b/mayan/apps/metadata/migrations/0003_auto__chg_field_metadatatype_lookup.py
index 0f868035c4..7dad4102b3 100644
--- a/mayan/apps/metadata/migrations/0003_auto__chg_field_metadatatype_lookup.py
+++ b/mayan/apps/metadata/migrations/0003_auto__chg_field_metadatatype_lookup.py
@@ -1,5 +1,4 @@
 # -*- coding: utf-8 -*-
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
@@ -8,12 +7,10 @@ from django.db import models
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-
         # Changing field 'MetadataType.lookup'
         db.alter_column('metadata_metadatatype', 'lookup', self.gf('django.db.models.fields.TextField')(null=True))
 
     def backwards(self, orm):
-
         # Changing field 'MetadataType.lookup'
         db.alter_column('metadata_metadatatype', 'lookup', self.gf('django.db.models.fields.CharField')(max_length=128, null=True))
 
@@ -137,4 +134,4 @@ class Migration(SchemaMigration):
         }
     }
 
-    complete_apps = ['metadata']
\ No newline at end of file
+    complete_apps = ['metadata']
diff --git a/mayan/apps/navigation/templatetags/navigation_tags.py b/mayan/apps/navigation/templatetags/navigation_tags.py
index e65df4dab6..e118a15c53 100644
--- a/mayan/apps/navigation/templatetags/navigation_tags.py
+++ b/mayan/apps/navigation/templatetags/navigation_tags.py
@@ -1,4 +1,4 @@
-from __future__ import absolute_import 
+from __future__ import absolute_import
 
 import copy
 import re
@@ -10,7 +10,7 @@ from django.template import (TemplateSyntaxError, Library,
     VariableDoesNotExist, Node, Variable)
 from django.utils.text import unescape_string_literal
 from django.utils.translation import ugettext as _
-from django.utils.encoding import smart_str, force_unicode, smart_unicode
+from django.utils.encoding import smart_str, smart_unicode
 
 from common.utils import urlquote
 
@@ -38,7 +38,7 @@ class TopMenuNavigationNode(Node):
             for child_path_regex in link.get('children_path_regex', []):
                 if re.compile(child_path_regex).match(current_path.lstrip('/')):
                     menu_links[index]['active'] = True
-            
+
             for children_view_regex in link.get('children_view_regex', []):
                 if re.compile(children_view_regex).match(current_view):
                     menu_links[index]['active'] = True
@@ -258,11 +258,11 @@ def object_navigation_template(context):
     new_context = copy.copy(context)
     new_context.update({
         'horizontal': True,
-        'object_navigation_links': _get_object_navigation_links(context)    
+        'object_navigation_links': _get_object_navigation_links(context)
     })
     return new_context
-    
-    
+
+
 @register.tag
 def get_multi_item_links(parser, token):
     tag_name, arg = token.contents.split(None, 1)
diff --git a/mayan/apps/ocr/__init__.py b/mayan/apps/ocr/__init__.py
index e49fcf8301..c5ce7e821e 100644
--- a/mayan/apps/ocr/__init__.py
+++ b/mayan/apps/ocr/__init__.py
@@ -2,11 +2,8 @@ from __future__ import absolute_import
 
 import logging
 
-from django.db import transaction
-from django.db.utils import DatabaseError
 from django.db.models.signals import post_save, post_syncdb
 from django.dispatch import receiver
-from django.utils.translation import ugettext
 from django.utils.translation import ugettext_lazy as _
 
 from acls.api import class_permissions
diff --git a/mayan/apps/ocr/views.py b/mayan/apps/ocr/views.py
index bb264a206a..0f52760afa 100644
--- a/mayan/apps/ocr/views.py
+++ b/mayan/apps/ocr/views.py
@@ -58,7 +58,6 @@ def queue_document_list(request, queue_name='default'):
         ]
     }
 
-
     return render_to_response('generic_list.html', context,
         context_instance=RequestContext(request))
 
diff --git a/mayan/apps/project_tools/__init__.py b/mayan/apps/project_tools/__init__.py
index f1ff69a88f..3336693271 100644
--- a/mayan/apps/project_tools/__init__.py
+++ b/mayan/apps/project_tools/__init__.py
@@ -1,7 +1,5 @@
 from __future__ import absolute_import
 
-from django.utils.translation import ugettext_lazy as _
-
 from navigation.api import register_top_menu
 
 from .links import link_tools
diff --git a/mayan/apps/sources/__init__.py b/mayan/apps/sources/__init__.py
index fbe3deadef..4aabeeb182 100644
--- a/mayan/apps/sources/__init__.py
+++ b/mayan/apps/sources/__init__.py
@@ -4,23 +4,18 @@ from django.utils.translation import ugettext_lazy as _
 
 from common.utils import encapsulate
 from documents.models import Document
-from documents.permissions import (PERMISSION_DOCUMENT_NEW_VERSION,
-    PERMISSION_DOCUMENT_CREATE)
 from navigation.api import register_links, register_model_list_columns
 from project_setup.api import register_setup
 
 from .links import (document_create_multiple, document_create_siblings,
-    staging_file_preview, staging_file_delete, setup_sources,
-    setup_web_form_list, setup_staging_folder_list,
-    setup_watch_folder_list, setup_source_edit, setup_source_delete,
-    setup_source_create, setup_source_transformation_list,
-    setup_source_transformation_create, setup_source_transformation_edit,
-    setup_source_transformation_delete, source_list, upload_version)
+    staging_file_delete, setup_sources, setup_web_form_list,
+    setup_staging_folder_list, setup_watch_folder_list,
+    setup_source_edit, setup_source_delete, setup_source_create,
+    setup_source_transformation_list, setup_source_transformation_create,
+    setup_source_transformation_edit, setup_source_transformation_delete,
+    upload_version)
 from .models import (WebForm, StagingFolder, SourceTransformation,
     WatchFolder)
-from .permissions import (PERMISSION_SOURCES_SETUP_VIEW,
-    PERMISSION_SOURCES_SETUP_EDIT, PERMISSION_SOURCES_SETUP_DELETE,
-    PERMISSION_SOURCES_SETUP_CREATE)
 from .staging import StagingFile
 from .widgets import staging_file_thumbnail
 
diff --git a/mayan/apps/sources/links.py b/mayan/apps/sources/links.py
index 4a3b0596f5..f62dfd9076 100644
--- a/mayan/apps/sources/links.py
+++ b/mayan/apps/sources/links.py
@@ -5,8 +5,7 @@ from django.utils.translation import ugettext_lazy as _
 from documents.permissions import (PERMISSION_DOCUMENT_NEW_VERSION,
     PERMISSION_DOCUMENT_CREATE)
 
-from .models import (WebForm, StagingFolder, SourceTransformation,
-    WatchFolder)
+from .models import (WebForm, StagingFolder, WatchFolder)
 from .permissions import (PERMISSION_SOURCES_SETUP_VIEW,
     PERMISSION_SOURCES_SETUP_EDIT, PERMISSION_SOURCES_SETUP_DELETE,
     PERMISSION_SOURCES_SETUP_CREATE)
diff --git a/mayan/apps/sources/migrations/0001_initial.py b/mayan/apps/sources/migrations/0001_initial.py
index e92afa7fcb..83a75f18af 100644
--- a/mayan/apps/sources/migrations/0001_initial.py
+++ b/mayan/apps/sources/migrations/0001_initial.py
@@ -4,10 +4,10 @@ from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Adding model 'StagingFolder'
         db.create_table('sources_stagingfolder', (
             ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
@@ -71,9 +71,8 @@ class Migration(SchemaMigration):
         ))
         db.send_create_signal('sources', ['OutOfProcess'])
 
-
     def backwards(self, orm):
-        
+
         # Deleting model 'StagingFolder'
         db.delete_table('sources_stagingfolder')
 
@@ -89,7 +88,6 @@ class Migration(SchemaMigration):
         # Deleting model 'OutOfProcess'
         db.delete_table('sources_outofprocess')
 
-
     models = {
         'contenttypes.contenttype': {
             'Meta': {'ordering': "('name',)", 'unique_together': "(('app_label', 'model'),)", 'object_name': 'ContentType', 'db_table': "'django_content_type'"},
diff --git a/mayan/apps/sources/migrations/0002_preview_width_required.py b/mayan/apps/sources/migrations/0002_preview_width_required.py
index 3cb2587561..22b4bf2a26 100644
--- a/mayan/apps/sources/migrations/0002_preview_width_required.py
+++ b/mayan/apps/sources/migrations/0002_preview_width_required.py
@@ -1,23 +1,19 @@
 # encoding: utf-8
-import datetime
 from south.db import db
 from south.v2 import SchemaMigration
 from django.db import models
 
+
 class Migration(SchemaMigration):
 
     def forwards(self, orm):
-        
         # Changing field 'StagingFolder.preview_width'
         db.alter_column('sources_stagingfolder', 'preview_width', self.gf('django.db.models.fields.IntegerField')(default=640))
 
-
     def backwards(self, orm):
-        
         # Changing field 'StagingFolder.preview_width'
         db.alter_column('sources_stagingfolder', 'preview_width', self.gf('django.db.models.fields.IntegerField')(null=True))
 
-
     models = {
         'contenttypes.contenttype': {
             'Meta': {'ordering': "('name',)", 'unique_together': "(('app_label', 'model'),)", 'object_name': 'ContentType', 'db_table': "'django_content_type'"},
diff --git a/mayan/apps/sources/views.py b/mayan/apps/sources/views.py
index 22d98ec0db..2cc55de94b 100644
--- a/mayan/apps/sources/views.py
+++ b/mayan/apps/sources/views.py
@@ -18,12 +18,10 @@ from acls.models import AccessEntry
 from common.utils import encapsulate
 from documents.conf.settings import THUMBNAIL_SIZE
 from documents.exceptions import NewDocumentVersionNotAllowed
-from documents.forms import DocumentTypeSelectForm
 from documents.models import DocumentType, Document
 from documents.permissions import (PERMISSION_DOCUMENT_CREATE,
     PERMISSION_DOCUMENT_NEW_VERSION)
 from metadata.api import decode_metadata_from_url, metadata_repr_as_list
-from metadata.forms import MetadataSelectionForm, MetadataFormSet
 from permissions.models import Permission
 
 from .forms import (SourceTransformationForm, SourceTransformationForm_create,
@@ -37,7 +35,6 @@ from .permissions import (PERMISSION_SOURCES_SETUP_VIEW,
     PERMISSION_SOURCES_SETUP_EDIT, PERMISSION_SOURCES_SETUP_DELETE,
     PERMISSION_SOURCES_SETUP_CREATE)
 from .staging import create_staging_file_class
-from .wizards import DocumentCreateWizard
 
 
 def document_create_siblings(request, document_id):
diff --git a/mayan/apps/storage/conf/settings.py b/mayan/apps/storage/conf/settings.py
index 860277480a..f1e835cf7a 100644
--- a/mayan/apps/storage/conf/settings.py
+++ b/mayan/apps/storage/conf/settings.py
@@ -1,7 +1,6 @@
 """Configuration options for the storage app"""
 import os
 
-from django.utils.translation import ugettext_lazy as _
 from django.conf import settings
 
 from smart_settings.api import register_settings
diff --git a/mayan/apps/tags/widgets.py b/mayan/apps/tags/widgets.py
index ab1d90c3eb..2e1e1a6093 100644
--- a/mayan/apps/tags/widgets.py
+++ b/mayan/apps/tags/widgets.py
@@ -1,4 +1,4 @@
-from django.utils.html import escape, strip_tags
+from django.utils.html import escape
 from django.utils.safestring import mark_safe
 
 
diff --git a/mayan/apps/user_management/management/commands/import_users.py b/mayan/apps/user_management/management/commands/import_users.py
index 9ccfbe09dc..73137a2403 100644
--- a/mayan/apps/user_management/management/commands/import_users.py
+++ b/mayan/apps/user_management/management/commands/import_users.py
@@ -5,7 +5,7 @@ import os
 import sys
 from optparse import make_option
 
-from django.core.management.base import BaseCommand, CommandError, LabelCommand
+from django.core.management.base import CommandError, LabelCommand
 from django.contrib.auth.models import User
 from django.db.utils import IntegrityError
 
@@ -80,6 +80,6 @@ class Command(LabelCommand):
 def _confirm(interactive):
     if not interactive:
         return 'yes'
-    return raw_input('You have requested to import a number of users from a CSV file.\n' 
+    return raw_input('You have requested to import a number of users from a CSV file.\n'
             'Are you sure you want to do this?\n'
             'Type \'yes\' to continue, or any other value to cancel: ')