Index: trunk/tests_python/accumulator_test.py
===================================================================
--- trunk/tests_python/accumulator_test.py	(revision 778)
+++ trunk/tests_python/accumulator_test.py	(revision 779)
@@ -1,31 +1,31 @@
 import unittest
 import npstat as ns
 import numpy as np
 
 class TestStatSccumulators(unittest.TestCase):
     def test_Accs(self):
         sampleSize = 100
         xmin = 0.0
         xmax = 5.0
         mcDistro = ns.TruncatedDistribution1D(ns.Exponential1D(0.0, 1.0), xmin, xmax)
         rng = ns.MersenneTwister()
-        sample = mcDistro.generate(rng, sampleSize)
+        sample = np.array(mcDistro.generate(rng, sampleSize))
 
         np_mean = np.mean(sample)
         np_std = np.std(sample, ddof=1)
 
         acc1 = ns.DoubleSampleAccumulator()
         acc1.accumulate(sample)
         self.assertEqual(np.min(sample), acc1.min())
         self.assertEqual(np.max(sample), acc1.max())
         self.assertAlmostEqual(np_mean, acc1.mean())
         self.assertAlmostEqual(np_std, acc1.stdev())
         print("\nRobust estimate of stdev is", acc1.sigmaRange())
 
         acc2 = ns.StatAccumulator()
         acc2.accumulate(sample)
         self.assertAlmostEqual(np_mean, acc2.mean())
         self.assertAlmostEqual(np_std, acc2.stdev())
 
 suite = unittest.TestLoader().loadTestsFromTestCase(TestStatSccumulators)
 unittest.TextTestRunner(verbosity=2).run(suite)