Use ==/!= to compare str, bytes, and int literals

common/djangoapps/django_comment_common/migrations/0003_enable_forums.py

@@ -7,7 +7,7 @@ from django.db import migrations, models
 def add_default_enable(apps, schema_editor):
     ForumsConfig = apps.get_model("django_comment_common", "ForumsConfig")
     settings_count = ForumsConfig.objects.count()
-    if settings_count is 0:
+    if settings_count == 0:
         # By default we want the comment client enabled, but this is *not* enabling
         # discussions themselves by default, as in showing the Disucussions tab, or
         # inline discussions, etc.  It just allows the underlying service client to work.

common/djangoapps/terrain/ui_helpers.py

@@ -634,12 +634,12 @@ def click_tools():
 
 @world.absorb
 def is_mac():
-    return platform.mac_ver()[0] is not ''
+    return platform.mac_ver()[0] != ''
 
 
 @world.absorb
 def is_firefox():
-    return world.browser.driver_name is 'Firefox'
+    return world.browser.driver_name == 'Firefox'
 
 
 @world.absorb