1 files changed, 7 insertions, 3 deletions

diff --git a/gnunet/gnsrecord.py b/gnunet/gnsrecord.py
index e9774c4..d869d05 100644
--- a/gnunet/gnsrecord.py
+++ b/gnunet/gnsrecord.py
@@ -26,14 +26,18 @@ TYPES.update(GNS_TYPES.items())
 
 
 class Data:
-    def __init__(self, record_type, data, expiration_time=None, private=None, pending=None, shadow=None):
+    def __init__(self, record_type, data, expiration_time=None, private=None,
+                 pending=None, shadow=None):
         self.record_type = str(record_type)
         if record_type not in TYPES:
             raise ValueError("'record_type' must be one of %s" % TYPES)
         # self.data = bytearray(data)
         self.data = str(data)
-        if expiration_time is not None and not isinstance(expiration_time, datetime.datetime) or isinstance(expiration_time, datetime.timedelta):
-            raise TypeError("'expiration_time' must be a datetime.datetime or a datetime.timedelta")
+        if (expiration_time is not None and
+            not isinstance(expiration_time,
+                           (datetime.datetime, datetime.timedelta))):
+            raise TypeError("'expiration_time' must be a datetime.datetime "
+                            "or a datetime.timedelta")
         self.expiration_time = expiration_time
         self.private = private
         self.pending = pending