Fixed #28708 -- Added constants to detect the Python version.

tests/view_tests/tests/test_debug.py

@@ -19,6 +19,7 @@ from django.urls import reverse
 from django.utils.encoding import force_bytes
 from django.utils.functional import SimpleLazyObject
 from django.utils.safestring import mark_safe
+from django.utils.version import PY36
 from django.views.debug import (
     CLEANSED_SUBSTITUTE, CallableSettingWrapper, ExceptionReporter,
     cleanse_setting, technical_500_response,
@@ -31,8 +32,6 @@ from ..views import (
     sensitive_method_view, sensitive_view,
 )
 
-PY36 = sys.version_info >= (3, 6)
-
 
 class User:
     def __str__(self):