fix tests

Author: thrasibule

test/test_hullwhite_model.py

@@ -1,6 +1,3 @@
-from __future__ import division
-from __future__ import print_function
-
 import unittest
 
 from quantlib.models.shortrate.onefactormodels.hullwhite import HullWhite
@@ -59,7 +56,7 @@ def test_hull_white_calibration(self):
                         )
         )
 
-        model = HullWhite(yield_ts, a=0.05, sigma=.005)
+        model = HullWhite(yield_ts, a=0.1, sigma=.01)
 
         data = [[1, 5, 0.1148 ],
                 [2, 4, 0.1108 ],
@@ -93,9 +90,8 @@ def test_hull_white_calibration(self):
         print('Hull White calibrated parameters:\na: %f sigma: %f' %
               (model.a, model.sigma))
 
-        cached_a = 0.0464041
-        cached_sigma = 0.00579912
-
+        cached_a = 0.04603
+        cached_sigma = 0.005779
         tolerance = 1.0e-5
 
         self.assertAlmostEqual(cached_a, model.a, delta=tolerance)