PEP8 cleanup, unused imports, missing imports, style cleanups

mayan/apps/document_signatures/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 'DocumentVersionSignature'
         db.create_table('document_signatures_documentversionsignature', (
             ('id', self.gf('django.db.models.fields.AutoField')(primary_key=True)),
@@ -17,13 +17,10 @@ class Migration(SchemaMigration):
         ))
         db.send_create_signal('document_signatures', ['DocumentVersionSignature'])
 
-
     def backwards(self, orm):
-        
         # Deleting model 'DocumentVersionSignature'
         db.delete_table('document_signatures_documentversionsignature')
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},

mayan/apps/document_signatures/migrations/0002_move_signatures_to_new_app.py

@@ -4,12 +4,13 @@ from south.db import db
 from south.v2 import DataMigration
 from django.db import models
 
+
 class Migration(DataMigration):
 
     depends_on = (
         ('documents', '0012_auto__add_field_documentversion_signature_file'),
     )
-    
+
     def forwards(self, orm):
         for document_version in orm['documents.DocumentVersion'].objects.all():
             if document_version.signature_state or document_version.signature_file:
@@ -20,15 +21,13 @@ class Migration(DataMigration):
                 )
                 document_signature.save()
 
-
     def backwards(self, orm):
         for document_signature in orm.DocumentVersionSignature.objects.all():
             document_version = document_signature.document_version
-            document_version.signature_state=document_signature.signature_state
-            document_version.signature_file=document_signature.signature_file
+            document_version.signature_state = document_signature.signature_state
+            document_version.signature_file = document_signature.signature_file
             document_version.save()
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},

mayan/apps/document_signatures/migrations/0003_auto__add_field_documentversionsignature_has_embedded_signature.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 'DocumentVersionSignature.has_embedded_signature'
         db.add_column('document_signatures_documentversionsignature', 'has_embedded_signature', self.gf('django.db.models.fields.BooleanField')(default=False), keep_default=False)
 
-
     def backwards(self, orm):
-        
         # Deleting field 'DocumentVersionSignature.has_embedded_signature'
         db.delete_column('document_signatures_documentversionsignature', 'has_embedded_signature')
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},

mayan/apps/document_signatures/migrations/0004_embedded_signature_state_copy.py

@@ -1,9 +1,9 @@
 # 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):
@@ -12,7 +12,7 @@ class Migration(DataMigration):
                 document_signature.has_embedded_signature = True
             else:
                 document_signature.has_embedded_signature = False
-            
+
             document_signature.save()
 
     def backwards(self, orm):
@@ -20,7 +20,6 @@ class Migration(DataMigration):
         # No way to revert
         raise RuntimeError("Cannot reverse this migration.")
 
-
     models = {
         'auth.group': {
             'Meta': {'object_name': 'Group'},

mayan/apps/document_signatures/migrations/0005_auto__del_field_documentversionsignature_signature_state.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):
-        
         # Deleting field 'DocumentVersionSignature.signature_state'
         db.delete_column('document_signatures_documentversionsignature', 'signature_state')
 
-
     def backwards(self, orm):
-        
         # Adding field 'DocumentVersionSignature.signature_state'
         db.add_column('document_signatures_documentversionsignature', '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'},