incr-282 (#20577)

* run python modernize

* run isort

lms/djangoapps/class_dashboard/dashboard_data.py

 """
 Computes the data to display on the Instructor Dashboard
 """
+from __future__ import absolute_import
+
 import json
 
 from django.db.models import Count
 from django.utils.translation import ugettext as _
-
 from opaque_keys.edx.locator import BlockUsageLocator
 from six import text_type
 

lms/djangoapps/class_dashboard/tests/test_dashboard_data.py

@@ -2,12 +2,15 @@
 Tests for class dashboard (Metrics tab in instructor dashboard)
 """
 
+from __future__ import absolute_import
+
 import json
 
-from django.urls import reverse
 from django.test.client import RequestFactory
+from django.urls import reverse
 from mock import patch
 from six import text_type
+from six.moves import range
 
 from capa.tests.response_xml_factory import StringResponseXMLFactory
 from class_dashboard.dashboard_data import (
@@ -60,7 +63,7 @@ class TestGetProblemGradeDistribution(SharedModuleStoreTestCase):
                 display_name=u"test unit omega \u03a9",
             )
             cls.items = []
-            for i in xrange(USER_COUNT - 1):
+            for i in range(USER_COUNT - 1):
                 item = ItemFactory.create(
                     parent_location=cls.unit.location,
                     category="problem",
@@ -80,7 +83,7 @@ class TestGetProblemGradeDistribution(SharedModuleStoreTestCase):
         self.attempts = 3
         self.users = [
             UserFactory.create(username="metric" + str(__))
-            for __ in xrange(USER_COUNT)
+            for __ in range(USER_COUNT)
         ]
 
         for user in self.users:

lms/djangoapps/class_dashboard/tests/test_views.py

 """
 Tests for class dashboard (Metrics tab in instructor dashboard)
 """
+from __future__ import absolute_import
+
 import json
 
 from django.test.client import RequestFactory

lms/djangoapps/class_dashboard/urls.py

 """
 Class Dashboard API endpoint urls.
 """
+from __future__ import absolute_import
+
 from django.conf import settings
 from django.conf.urls import url
 
-import class_dashboard.views
 import class_dashboard.dashboard_data
+import class_dashboard.views
 
 COURSE_ID_PATTERN = settings.COURSE_ID_PATTERN
 

lms/djangoapps/class_dashboard/views.py

@@ -2,6 +2,8 @@
 Handles requests for data, returning a json
 """
 
+from __future__ import absolute_import
+
 import json
 import logging