INCR-256 Run python-modernize on lms/djangoapps/debug (#20564)

* run python modernize

* run isort

lms/djangoapps/debug/management/commands/dump_xml_courses.py

@@ -7,10 +7,11 @@ each as a separate output file containing the json representation
 of each of its fields (including those fields that are set as default values).
 """
 
-from __future__ import print_function
+from __future__ import absolute_import, print_function
 
 import json
 
+import six
 from django.conf import settings
 from django.core.management.base import BaseCommand, CommandError
 from path import Path as path
@@ -40,12 +41,12 @@ class Command(BaseCommand):
 
         export_dir = path(args[0])
 
-        for course_id, course_modules in xml_module_store.modules.iteritems():
+        for course_id, course_modules in six.iteritems(xml_module_store.modules):
             course_path = course_id.replace('/', '_')
-            for location, descriptor in course_modules.iteritems():
+            for location, descriptor in six.iteritems(course_modules):
                 location_path = text_type(location).replace('/', '_')
                 data = {}
-                for field_name, field in descriptor.fields.iteritems():
+                for field_name, field in six.iteritems(descriptor.fields):
                     try:
                         data[field_name] = field.read_json(descriptor)
                     except Exception as exc:  # pylint: disable=broad-except

lms/djangoapps/debug/views.py

@@ -1,5 +1,7 @@
 """Views for debugging and diagnostics"""
 
+from __future__ import absolute_import
+
 import pprint
 import traceback