Improve accuracy of gamma test function
diff --git a/Lib/test/test_random.py b/Lib/test/test_random.py
index 07e12d3..8ad701b 100644
--- a/Lib/test/test_random.py
+++ b/Lib/test/test_random.py
@@ -5,7 +5,7 @@
import time
import pickle
import warnings
-from math import log, exp, sqrt, pi
+from math import log, exp, sqrt, pi, sum as msum
from test import test_support
class TestBasicOps(unittest.TestCase):
@@ -465,11 +465,9 @@
def gamma(z, cof=_gammacoeff, g=7):
z -= 1.0
- sum = cof[0]
- for i in xrange(1,len(cof)):
- sum += cof[i] / (z+i)
+ s = msum([cof[0]] + [cof[i] / (z+i) for i in range(1,len(cof))])
z += 0.5
- return (z+g)**z / exp(z+g) * sqrt(2*pi) * sum
+ return (z+g)**z / exp(z+g) * sqrt(2.0*pi) * s
class TestDistributions(unittest.TestCase):
def test_zeroinputs(self):