Fix Flake8 style warnings in horizon/

Warnings H904, H307 and H405 are new or considerably changed, and will
be fixed in a separate patch.

Partial-bug: #1347472

Change-Id: Id9325a40d443f77242d3634002789501afbfc35a
Co-Authored-By: Juan M. Olle <juan.m.olle@intel.com>

horizon/browsers/views.py

@@ -44,8 +44,10 @@ class ResourceBrowserView(MultiTableView):
     def get_tables(self):
         tables = super(ResourceBrowserView, self).get_tables()
         # Tells the navigation table what is selected.
-        navigation_table = tables[self.browser_class.navigation_table_class._meta.name]
-        navigation_item = self.kwargs.get(self.browser_class.navigation_kwarg_name)
+        navigation_table = tables[
+            self.browser_class.navigation_table_class._meta.name]
+        navigation_item = self.kwargs.get(
+            self.browser_class.navigation_kwarg_name)
         navigation_table.current_item_id = navigation_item
         return tables
 

horizon/site_urls.py

@@ -21,6 +21,7 @@ from django.conf.urls import include  # noqa
 from django.conf.urls import patterns  # noqa
 from django.conf.urls import url  # noqa
 from django.views.generic import TemplateView  # noqa
+
 from horizon.test.jasmine import jasmine
 
 urlpatterns = patterns('horizon.views',

horizon/tables/actions.py

@@ -14,7 +14,7 @@
 
 from collections import defaultdict
 import logging
-import new
+import types
 
 from django.conf import settings
 from django.core import urlresolvers
@@ -293,12 +293,12 @@ class Action(BaseAction):
         if not has_single:
             def single(self, data_table, request, object_id):
                 return self.handle(data_table, request, [object_id])
-            self.single = new.instancemethod(single, self)
+            self.single = types.MethodType(single, self)
 
         if not has_multiple and self.handles_multiple:
             def multiple(self, data_table, request, object_ids):
                 return self.handle(data_table, request, object_ids)
-            self.multiple = new.instancemethod(multiple, self)
+            self.multiple = types.MethodType(multiple, self)
 
     def get_param_name(self):
         """Returns the full POST parameter name for this action.

horizon/templatetags/bootstrap_form_field.py

@@ -1,9 +1,20 @@
-from django import forms
-from django.template import Context
-from django.template.loader import get_template
-from django import template
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from django import forms
+from django import template as django_template
+
+register = django_template.Library()
 
-register = template.Library()
 
 @register.filter
 def bootstrap_form_field(element):
@@ -12,8 +23,10 @@ def bootstrap_form_field(element):
 
 
 def add_input_classes(field):
-    if not is_checkbox(field) and not is_multiple_checkbox(field) and not is_radio(field) \
-        and not is_file(field):
+    if (not is_checkbox(field) and
+            not is_multiple_checkbox(field) and
+            not is_radio(field) and
+            not is_file(field)):
         field_classes = field.field.widget.attrs.get('class', '')
         field_classes += ' form-control'
         field.field.widget.attrs['class'] = field_classes
@@ -21,8 +34,10 @@ def add_input_classes(field):
 
 def render(element, markup_classes):
     add_input_classes(element)
-    template = get_template("horizon/common/_bootstrap_form_field.html")
-    context = Context({'field': element, 'classes': markup_classes})
+    template = django_template.loader.get_template(
+        "horizon/common/_bootstrap_form_field.html")
+    context = django_template.Context({'field': element,
+                                       'classes': markup_classes})
 
     return template.render(context)
 

horizon/templatetags/parse_date.py

@@ -21,6 +21,7 @@ Template tags for parsing date strings.
 """
 
 from datetime import datetime  # noqa
+
 from django import template
 from django.utils import timezone
 

horizon/test/helpers.py

@@ -37,9 +37,10 @@ LOG = logging.getLogger(__name__)
 
 
 try:
-    from horizon.test.webdriver import WebDriver  # noqa
     from selenium.webdriver.support import ui as selenium_ui
     import xvfbwrapper  # Only needed when running the Selenium tests headless
+
+    from horizon.test.webdriver import WebDriver  # noqa
 except ImportError as e:
     # NOTE(saschpe): Several distribution can't ship selenium due to its
     # non-free license. So they have to patch it out of test-requirements.txt

horizon/test/jasmine/jasmine.py

@@ -10,11 +10,12 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-import django.shortcuts
-import django.views.defaults
 import inspect
 import sys
 
+import django.shortcuts
+import django.views.defaults
+
 
 def dispatcher(request, test_name):
     # import is included in this non-standard location to avoid

horizon/test/settings.py

@@ -22,10 +22,11 @@ import sys
 
 import django
 from django.utils import html_parser
-from horizon.test import patches
 import xstatic.main
 import xstatic.pkg.jquery
 
+from horizon.test import patches
+
 
 # Patch django.utils.html_parser.HTMLParser as a workaround for bug 1273943
 if django.get_version() == '1.4' and sys.version_info[:3] > (2, 7, 3):

horizon/utils/secret_key.py

@@ -14,12 +14,12 @@
 
 
 from __future__ import with_statement  # Python 2.5 compliance
-
-import lockfile
 import os
 import random
 import string
 
+import lockfile
+
 
 class FilePermissionError(Exception):
     """The key file permissions are insecure."""