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

cms/djangoapps/contentstore/views/tests/test_assets.py

@@ -294,7 +294,7 @@ class PaginationTestCase(AssetsTestCase):
         assets_response = json_response['assets']
         self.assertEquals(filter_value_split, json_response['assetTypes'])
 
-        if filter_value is not '':
+        if filter_value != '':
             content_types = [asset['content_type'].lower()
                              for asset in assets_response]
             if 'OTHER' in filter_value_split:

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

common/lib/xmodule/xmodule/fields.py

@@ -48,7 +48,7 @@ class Date(JSONField):
         """
         if field is None:
             return field
-        elif field is "":
+        elif field == "":
             return None
         elif isinstance(field, basestring):
             return self._parse_date_wo_default_month_day(field)

lms/djangoapps/grades/course_grade_factory.py

@@ -156,7 +156,7 @@ class CourseGradeFactory(object):
             course_data,
             persistent_grade.percent_grade,
             persistent_grade.letter_grade,
-            persistent_grade.letter_grade is not u''
+            persistent_grade.letter_grade != u''
         )
 
     @staticmethod

scripts/xsslint/xsslint/visitors.py

@@ -198,7 +198,7 @@ class FormatInterpolateVisitor(BaseVisitor):
             node: The AST root node.
 
         """
-        if isinstance(node.func, ast.Attribute) and node.func.attr is 'format':
+        if isinstance(node.func, ast.Attribute) and node.func.attr == 'format':
             if self.format_caller_node is None:
                 # Store the caller, or left-hand-side node of the initial
                 # format() call.