Change type checking in object serialisation

Placate pylint.

1 files changed, 3 insertions, 2 deletions

diff --git a/obnamlib/obj_serialiser.py b/obnamlib/obj_serialiser.py
index b39505d9..953bd3a8 100644
--- a/obnamlib/obj_serialiser.py
+++ b/obnamlib/obj_serialiser.py
@@ -147,8 +147,9 @@ def _next_object(pos, length):
 
 def _serialise_dict(obj):
     keys = obj.keys()
-    int_keys = [key for key in keys if type(obj[key]) in (int, long)]
-    str_keys = [key for key in keys if type(obj[key]) is str]
+    int_keys = [key for key in keys
+                if isinstance(obj[key], int) or isinstance(obj[key], long)]
+    str_keys = [key for key in keys if isinstance(obj[key], str)]
     special_keys = set(int_keys).union(set(str_keys))
     other_keys = [key for key in keys if key not in special_keys]