Import and PEP8 cleanups

apps/history/__init__.py

@@ -3,15 +3,13 @@ from __future__ import absolute_import
 from django.utils.translation import ugettext_lazy as _
 
 from project_tools.api import register_tool
-from navigation.api import (bind_links, register_top_menu,
-    register_model_list_columns,
-    register_sidebar_template, Link)
+from navigation.api import bind_links, register_model_list_columns
 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, [
@@ -26,7 +24,7 @@ register_model_list_columns(History, [
     {
         'name': _(u'summary'),
         'attribute': encapsulate(lambda entry: unicode(entry.get_processed_summary()))
-    }    
+    }
 ])
 
 bind_links([History], [history_details])

apps/history/api.py

@@ -5,7 +5,6 @@ import json
 
 from django.db import transaction
 from django.core import serializers
-from django.shortcuts import get_object_or_404
 from django.db import models
 from django.db.utils import DatabaseError
 
@@ -17,7 +16,7 @@ class EventNamespace(object):
     def __init__(self, name, label):
         self.name = name
         self.label = label
-        
+
 
 class Event(object):
     @transaction.commit_on_success
@@ -37,8 +36,7 @@ class Event(object):
             history_types_dict[self.namespace.name][self.name] = self
         except DatabaseError:
             # Special case for syncdb
-            transaction.rollback()        
-
+            transaction.rollback()
 
     def commit(self, source_object=None, data=None):
         new_history = History(history_type=self.history_type_obj)

apps/history/views.py

@@ -16,7 +16,7 @@ from acls.models import AccessEntry
 from .models import History, HistoryType
 from .forms import HistoryDetailForm
 from .permissions import PERMISSION_HISTORY_VIEW
-from .widgets import history_entry_object_link, history_entry_summary
+from .widgets import history_entry_object_link
 
 
 def history_list(request, object_list=None, title=None, extra_context=None):
@@ -76,11 +76,11 @@ def history_for_object(request, app_label, module_name, object_id):
 
 def history_view(request, object_id):
     history = get_object_or_404(History, pk=object_id)
-    
+
     try:
         Permission.objects.check_permissions(request.user, [PERMISSION_HISTORY_VIEW])
     except PermissionDenied:
-        AccessEntry.objects.check_access(PERMISSION_HISTORY_VIEW, request.user, history.content_object)    
+        AccessEntry.objects.check_access(PERMISSION_HISTORY_VIEW, request.user, history.content_object)
 
     form = HistoryDetailForm(instance=history, extra_fields=[
         {'label': _(u'Date'), 'field': lambda x: x.datetime.date()},
@@ -99,7 +99,7 @@ def history_view(request, object_id):
 
 def history_type_list(request, history_type_pk):
     history_type = get_object_or_404(HistoryType, pk=history_type_pk)
-    
+
     return history_list(
         request,
         object_list=History.objects.filter(history_type=history_type),