incr-301 (#20625)

* run python modernize

* run isort

lms/djangoapps/discussion/signals/handlers.py

@@ -1,19 +1,21 @@
 """
 Signal handlers related to discussions.
 """
+from __future__ import absolute_import
+
 import logging
 
+import six
 from django.conf import settings
 from django.dispatch import receiver
+from opaque_keys.edx.locator import LibraryLocator
 
 from lms.djangoapps.discussion import tasks
 from openedx.core.djangoapps.django_comment_common import signals
-from opaque_keys.edx.locator import LibraryLocator
 from openedx.core.djangoapps.site_configuration.models import SiteConfiguration
 from openedx.core.djangoapps.theming.helpers import get_current_site
 from xmodule.modulestore.django import SignalHandler
 
-
 log = logging.getLogger(__name__)
 
 
@@ -31,7 +33,7 @@ def update_discussions_on_course_publish(sender, course_key, **kwargs):  # pylin
         return
 
     context = {
-        'course_id': unicode(course_key),
+        'course_id': six.text_type(course_key),
     }
     tasks.update_discussions_map.apply_async(
         args=[context],
@@ -62,7 +64,7 @@ def send_discussion_email_notification(sender, user, post, **kwargs):
 def send_message(comment, site):
     thread = comment.thread
     context = {
-        'course_id': unicode(thread.course_id),
+        'course_id': six.text_type(thread.course_id),
         'comment_id': comment.id,
         'comment_body': comment.body,
         'comment_author_id': comment.user_id,