diff options
| -rw-r--r-- | Doc/library/random.rst | 10 | ||||
| -rw-r--r-- | Lib/random.py | 4 | ||||
| -rw-r--r-- | Lib/test/test_random.py | 4 | ||||
| -rw-r--r-- | Misc/NEWS.d/next/Library/2022-02-15-07-39-43.bpo-46737.6Pnblt.rst | 2 |
4 files changed, 16 insertions, 4 deletions
diff --git a/Doc/library/random.rst b/Doc/library/random.rst index da4a4f6..96c6300 100644 --- a/Doc/library/random.rst +++ b/Doc/library/random.rst @@ -320,7 +320,7 @@ be found in any statistics text. math.gamma(alpha) * beta ** alpha -.. function:: gauss(mu, sigma) +.. function:: gauss(mu=0.0, sigma=1.0) Normal distribution, also called the Gaussian distribution. *mu* is the mean, and *sigma* is the standard deviation. This is slightly faster than @@ -333,6 +333,9 @@ be found in any statistics text. number generator. 2) Put locks around all calls. 3) Use the slower, but thread-safe :func:`normalvariate` function instead. + .. versionchanged:: 3.11 + *mu* and *sigma* now have default arguments. + .. function:: lognormvariate(mu, sigma) @@ -342,10 +345,13 @@ be found in any statistics text. zero. -.. function:: normalvariate(mu, sigma) +.. function:: normalvariate(mu=0.0, sigma=1.0) Normal distribution. *mu* is the mean, and *sigma* is the standard deviation. + .. versionchanged:: 3.11 + *mu* and *sigma* now have default arguments. + .. function:: vonmisesvariate(mu, kappa) 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() diff --git a/Misc/NEWS.d/next/Library/2022-02-15-07-39-43.bpo-46737.6Pnblt.rst b/Misc/NEWS.d/next/Library/2022-02-15-07-39-43.bpo-46737.6Pnblt.rst new file mode 100644 index 0000000..c3f693a --- /dev/null +++ b/Misc/NEWS.d/next/Library/2022-02-15-07-39-43.bpo-46737.6Pnblt.rst @@ -0,0 +1,2 @@ +:func:`random.gauss` and :func:`random.normalvariate` now have default +arguments. |