Fix pep8 errors

Recent pep8 upgrade and corresponding pycodestyle update break
horizon pep8 job due to the new rules.

This commit fixes the following new errors:
- E226 missing whitespace around arithmetic operator
- E241 multiple spaces after ','
- E731 do not assign a lambda expression, use a def

The following errors are added to the ignore list
as there are many errors:
- E402 module level import not at top of file
- W503 line break before binary operator

Change-Id: I3478b0684175d2604bbcc1d89cbfca298b97f1e1

openstack_dashboard/dashboards/project/instances/utils.py

@@ -53,7 +53,8 @@ def sort_flavor_list(request, flavors):
         sort_key = flavor_sort.get('key', 'ram')
         rev = flavor_sort.get('reverse', False)
         if not callable(sort_key):
-            key = lambda flavor: get_key(flavor, sort_key)
+            def key(flavor):
+                return get_key(flavor, sort_key)
         else:
             key = sort_key
         flavor_list = [(flavor.id, '%s' % flavor.name)

openstack_dashboard/test/integration_tests/basewebobject.py

@@ -153,5 +153,6 @@ class BaseWebObject(unittest.TestCase):
                 pass
 
     def wait_till_spinner_disappears(self):
-        getter = lambda: self.driver.find_element(*self._spinner_locator)
+        def getter():
+            return self.driver.find_element(*self._spinner_locator)
         self.wait_till_element_disappears(getter)

tox.ini

@@ -155,7 +155,9 @@ commands =
 [flake8]
 filename = *.py,django.wsgi
 exclude = .venv,.git,.tox,dist,*lib/python*,*egg,build,panel_template,dash_template,local_settings.py,*/local/*,*/test/test_plugins/*,.ropeproject,node_modules,openstack_dashboard/enabled/*
-ignore =
+# E402 module level import not at top of file
+# W503 line break before binary operator
+ignore = E402,W503
 # Enable the following hacking rules which are disabled by default
 # H106 Do not put vim configuration in source files.
 # H203 Use assertIs(Not)None to check for None.