1 files changed, 3 insertions, 3 deletions

diff --git a/gedf_test.py b/gedf_test.py
index 5a3c0c4..8457901 100644
--- a/gedf_test.py
+++ b/gedf_test.py
@@ -80,7 +80,7 @@ def gedf_test(stream):
 ###############################################################################
 
 # Internal representation of a Job
-class Job():
+class Job(object):
     def __init__(self, record):
         self.pid = record.pid
         self.job = record.job
@@ -89,10 +89,10 @@ class Job():
         self.inversion_start = None
         self.inversion_end = None
     def __str__(self):
-        return "({}.{}:{})".format(self.pid,self.job,self.deadline)
+        return "(%d.%d:%d)" % (self.pid,self.job,self.deadline)
 
 # G-EDF errors: the start or end of an inversion
-class Error():
+class Error(object):
     def __init__(self, job, eligible, on_cpu):
         self.job = copy.copy(job)
         self.eligible = copy.copy(eligible)