--- a/python/prediction.py	Wed May 20 12:04:22 2015 +0200
+++ b/python/prediction.py	Wed May 20 13:57:47 2015 +0200
@@ -2,12 +2,13 @@
 '''Library for motion prediction methods'''
 
 import moving
-import math
-import random
-import numpy as np
 from utils import LCSS
 
-class PredictedTrajectory:
+import math, random
+import numpy as np
+
+
+class PredictedTrajectory(object):
     '''Class for predicted trajectories with lazy evaluation
     if the predicted position has not been already computed, compute it
 
@@ -294,7 +295,7 @@
     return currentInstant, collisionPoints, crossingZones
 
 
-class PredictionParameters:
+class PredictionParameters(object):
     def __init__(self, name, maxSpeed):
         self.name = name
         self.maxSpeed = maxSpeed