diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/random.py | 4 | ||||
| -rw-r--r-- | Lib/test/test_random.py | 4 |
2 files changed, 6 insertions, 2 deletions
diff --git a/Lib/random.py b/Lib/random.py index 6d7b617..1f3530e 100644 --- a/Lib/random.py +++ b/Lib/random.py @@ -538,7 +538,7 @@ class Random(_random.Random): low, high = high, low return low + (high - low) * _sqrt(u * c) - def normalvariate(self, mu, sigma): + def normalvariate(self, mu=0.0, sigma=1.0): """Normal distribution. mu is the mean, and sigma is the standard deviation. @@ -559,7 +559,7 @@ class Random(_random.Random): break return mu + z * sigma - def gauss(self, mu, sigma): + def gauss(self, mu=0.0, sigma=1.0): """Gaussian distribution. mu is the mean, and sigma is the standard deviation. This is diff --git a/Lib/test/test_random.py b/Lib/test/test_random.py index 5b066d2..32e7868 100644 --- a/Lib/test/test_random.py +++ b/Lib/test/test_random.py @@ -409,6 +409,10 @@ class TestBasicOps: self.assertRaises(ValueError, self.gen.randbytes, -1) self.assertRaises(TypeError, self.gen.randbytes, 1.0) + def test_mu_sigma_default_args(self): + self.assertIsInstance(self.gen.normalvariate(), float) + self.assertIsInstance(self.gen.gauss(), float) + try: random.SystemRandom().random() |