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| author | Raymond Hettinger <python@rcn.com> | 2016-10-29 23:55:36 (GMT) |
|---|---|---|
| committer | Raymond Hettinger <python@rcn.com> | 2016-10-29 23:55:36 (GMT) |
| commit | 30d00e54dde47b11f5b338aaba17760b641e1705 (patch) | |
| tree | 4d185bcc465b08f57558d1b8b39f788efba2fc82 /Lib/test/test_random.py | |
| parent | ab5cf4da4e57fd317e6c4baaaa1d679c0ee9ef08 (diff) | |
| download | cpython-30d00e54dde47b11f5b338aaba17760b641e1705.zip cpython-30d00e54dde47b11f5b338aaba17760b641e1705.tar.gz cpython-30d00e54dde47b11f5b338aaba17760b641e1705.tar.bz2 | |
Issue #18844: Make the various ways for specifing weights produce the same results.
Diffstat (limited to 'Lib/test/test_random.py')
| -rw-r--r-- | Lib/test/test_random.py | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Lib/test/test_random.py b/Lib/test/test_random.py index 4d5a874..dd27152 100644 --- a/Lib/test/test_random.py +++ b/Lib/test/test_random.py @@ -629,6 +629,22 @@ class MersenneTwister_TestBasicOps(TestBasicOps, unittest.TestCase): self.assertTrue(stop < x <= start) self.assertEqual((x+stop)%step, 0) + def test_choices_algorithms(self): + # The various ways of specifing weights should produce the same results + choices = self.gen.choices + n = 13132817 + + self.gen.seed(8675309) + a = self.gen.choices(range(n), k=10000) + + self.gen.seed(8675309) + b = self.gen.choices(range(n), [1]*n, k=10000) + self.assertEqual(a, b) + + self.gen.seed(8675309) + c = self.gen.choices(range(n), cum_weights=range(1, n+1), k=10000) + self.assertEqual(a, c) + def gamma(z, sqrt2pi=(2.0*pi)**0.5): # Reflection to right half of complex plane if z < 0.5: |