1 files changed, 4 insertions, 6 deletions

diff --git a/Mailman/versions.py b/Mailman/versions.py
index 4b3990684..77a88056c 100644
--- a/Mailman/versions.py
+++ b/Mailman/versions.py
@@ -34,8 +34,6 @@ run again until another version change is detected.
 
 import logging
 
-from types import ListType, StringType
-
 from Mailman import mm_cfg
 from Mailman import Message
 from Mailman import Utils
@@ -268,12 +266,12 @@ def UpdateOldVars(l, stored_state):
     # transfer the list data type for holding members and digest members
     # to the dict data type starting file format version 11
     #
-    if type(l.members) is ListType:
+    if isinstance(l.members, list):
         members = {}
         for m in l.members:
             members[m] = 1
         l.members = members
-    if type(l.digest_members) is ListType:
+    if isinstance(l.digest_members, list):
         dmembers = {}
         for dm in l.digest_members:
             dmembers[dm] = 1
@@ -293,7 +291,7 @@ def UpdateOldVars(l, stored_state):
         if k.lower() <> k:
             l.members[k.lower()] = Utils.LCDomain(k)
             del l.members[k]
-        elif type(l.members[k]) == StringType and k == l.members[k].lower():
+        elif isinstance(l.members[k], str) and k == l.members[k].lower():
             # already converted
             pass
         else:
@@ -302,7 +300,7 @@ def UpdateOldVars(l, stored_state):
         if k.lower() <> k:
             l.digest_members[k.lower()] = Utils.LCDomain(k)
             del l.digest_members[k]
-        elif type(l.digest_members[k]) == StringType and \
+        elif isinstance(l.digest_members[k], str) and \
                  k == l.digest_members[k].lower():
             # already converted
             pass