mirrors
/
cpython
mirror of https://github.com/python/cpython.git
2
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

merge

This commit is contained in:
Raymond Hettinger 2016-10-29 17:43:02 -07:00
parent ba25f61490 77d574d4ae
commit fdf6716ea9
1 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
Lib/test/test_random.py
View File

@ -641,6 +641,23 @@ def test_choices_algorithms(self):
c = self.gen.choices(range(n), cum_weights=range(1, n+1), k=10000) c = self.gen.choices(range(n), cum_weights=range(1, n+1), k=10000)
self.assertEqual(a, c) self.assertEqual(a, c)
# Amerian Roulette
population = ['Red', 'Black', 'Green']
weights = [18, 18, 2]
cum_weights = [18, 36, 38]
expanded_population = ['Red'] * 18 + ['Black'] * 18 + ['Green'] * 2
self.gen.seed(9035768)
a = self.gen.choices(expanded_population, k=10000)
self.gen.seed(9035768)
b = self.gen.choices(population, weights, k=10000)
self.assertEqual(a, b)
self.gen.seed(9035768)
c = self.gen.choices(population, cum_weights=cum_weights, k=10000)
self.assertEqual(a, c)
def gamma(z, sqrt2pi=(2.0*pi)**0.5): def gamma(z, sqrt2pi=(2.0*pi)**0.5):
# Reflection to right half of complex plane # Reflection to right half of complex plane
if z < 0.5: if z < 0.5: