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209 Commits

Author SHA1 Message Date
Raymond Hettinger b05352e4c2
bpo-44018: random.seed() no longer mutates its inputs (GH-25856) 2021-05-03 16:11:35 -07:00
Raymond Hettinger 2a36b09ce7
Improve the error message for choices(population, 10) (GH-25267) 2021-04-19 20:29:48 -07:00
Raymond Hettinger d9dda32040
Reduce overhead on random timings (GH-24455) 2021-02-04 21:36:03 -08:00
Serhiy Storchaka f066bd94b9
bpo-37319: Improve documentation, code and tests of randrange. (GH-19112) 2021-01-25 23:02:04 +02:00
jonanifranco f7b5bacd7a
bpo-42944 Fix Random.sample when counts is not None (GH-24235) 2021-01-18 10:04:29 -08:00
Setrak Balian 998ae1fa3f
bpo-42931: randbytes missing from random.__all__ (GH-24219) 2021-01-15 09:50:42 -08:00
Raymond Hettinger 8f8de7380c
No need to test "istep==1" twice. (GH-24064) 2021-01-02 12:09:56 -08:00
Raymond Hettinger 768fa145cf
bpo-42772: Step argument ignored when stop is None. (GH-24018) 2021-01-02 10:24:51 -08:00
Raymond Hettinger a9621bb301
bpo-42222: Modernize integer test/conversion in randrange() (#23064) 2020-12-28 11:10:34 -08:00
masklinn 1e27b57dbc
bpo-42470: Do not warn on sequences which are also sets in random.sample() (GH-23665) 2020-12-18 20:33:36 -08:00
Ram Rachum b0dfc75816
bpo-41773: Raise exception for non-finite weights in random.choices(). (GH-22441) 2020-09-28 18:32:10 -07:00
Raymond Hettinger 6a613f90bf
random module: Convert a "while 1" to "while True (GH-21700) 2020-08-02 12:03:32 -07:00
Raymond Hettinger 5c3270939c
bpo-41421: Algebraic simplification for random.paretovariate() (GH-21695) 2020-08-01 01:18:26 -07:00
Raymond Hettinger ef19bad7d6
Improve code organization for the random module (GH-21161) 2020-06-25 17:03:50 -07:00
Raymond Hettinger 26a1ad1c24
Small clean-ups for the random module (GH-21038) 2020-06-22 19:38:59 -07:00
Raymond Hettinger 9db5b8d448
Minor code clean-ups (GH-20838) 2020-06-13 09:46:47 -07:00
Raymond Hettinger 81a5fc38e8
bpo-40541: Add optional *counts* parameter to random.sample() (GH-19970) 2020-05-08 07:53:15 -07:00
Raymond Hettinger 190fac99c5
bpo-40465: Deprecate the optional argument to random.shuffle(). (#19867) 2020-05-02 16:45:32 -07:00
Raymond Hettinger 4168f1e460
Simplify choice()'s interaction with the private _randbelow() method (GH-19831) 2020-05-01 10:34:19 -07:00
Victor Stinner 2d8757758d
bpo-40286: Remove C implementation of Random.randbytes() (GH-19797) 
Remove _random.Random.randbytes(): the C implementation of
randbytes(). Implement the method in Python to ease subclassing:
randbytes() now directly reuses getrandbits().
 2020-04-29 18:49:00 +02:00
Raymond Hettinger 4fe002045f
bpo-40325: Deprecate set object support in random.sample() (GH-19591) 2020-04-19 00:36:42 -07:00
Antoine Pitrou 75a3378810
bpo-40282: Allow random.getrandbits(0) (GH-19539) 2020-04-17 19:32:14 +02:00
Victor Stinner 9f5fe7910f
bpo-40286: Add randbytes() method to random.Random (GH-19527) 
Add random.randbytes() function and random.Random.randbytes()
method to generate random bytes.

Modify secrets.token_bytes() to use SystemRandom.randbytes()
rather than calling directly os.urandom().

Rename also genrand_int32() to genrand_uint32(), since it returns an
unsigned 32-bit integer, not a signed integer.

The _random module is now built with Py_BUILD_CORE_MODULE defined.
 2020-04-17 19:05:35 +02:00
Raymond Hettinger 041d8b48a2
bpo-38881: choices() raises ValueError when all weights are zero (GH-17362) 2019-11-23 02:22:13 -08:00
Raymond Hettinger d0cdeaab76
bpo-32554: Deprecate hashing arbitrary types in random.seed() (GH-15382) 2019-08-22 09:19:36 -07:00
Serhiy Storchaka 2085bd0877
bpo-37116: Use PEP 570 syntax for positional-only parameters. (GH-13700) 2019-06-01 11:00:15 +03:00
Christian Heimes d914596a67 bpo-36559: random module: optimize sha512 import (GH-12742) 
The random module now prefers the lean internal _sha512 module over hashlib
for seed(version=2) to optimize import time.

Signed-off-by: Christian Heimes <christian@python.org>
 2019-04-10 13:18:02 -07:00
Raymond Hettinger 5382203ae1
Convert range to repeat for choices() (#11889) 2019-02-16 13:30:51 -08:00
Raymond Hettinger cfd31f0af2 Be consistent about the use of from-imports in random module (GH-11837) 
Minor code clean-up.
 2019-02-13 02:04:17 -08:00
Kumar Akshay 2433a2ab70 bpo-35782: Fix error message in randrange (GH-11620) 
https://bugs.python.org/issue35782
 2019-01-21 11:19:59 -08:00
leodema 63d152232e bpo-30561: Sync-up expovariate() and gammavariate code (GH-1934) 2018-12-23 22:54:25 -08:00
Victor Stinner 8db5b54463
bpo-35513, unittest: TextTestRunner uses time.perf_counter() (GH-11180) 
TextTestRunner of unittest.runner now uses time.perf_counter() rather
than time.time() to measure the execution time of a test: time.time()
can go backwards, whereas time.perf_counter() is monotonic.

Similar change made in libregrtest, pprint and random.
 2018-12-17 11:30:34 +01:00
Raymond Hettinger 09473ac063
Remove unnecessary and over-restrictive type check (GH-10905) 2018-12-04 14:53:14 -08:00
Raymond Hettinger 7fc633f5a5 Add comments regarding speed/space/entropy trade-offs (GH-10885) 2018-12-04 00:13:38 -08:00
Raymond Hettinger 0a18e0510a Hoist the float conversion out of the inner loop. (GH-10430) 
Currently, the *n* and *total* variables get converted to floats each time they are multiplied by random().  This minor tweak does the conversion just once and gets a small speedup (approx 3%).
 2018-11-09 02:39:50 -08:00
Raymond Hettinger e69cd169af
Minor code refactoring. Compute len() one fewer times on one code path. (GH-8094) 2018-07-04 15:28:20 -07:00
Raymond Hettinger ddf7171911
bpo-24567: Random subnormal.diff (#7954) 
Handle subnormal weights for choices()
 2018-06-27 01:08:31 -07:00
Serhiy Storchaka ec1622d56c
bpo-33144: Fix choosing random.Random._randbelow implementation. (GH-6563) 
random() takes precedence over getrandbits() if defined later
in the class tree.
 2018-05-08 15:45:15 +03:00
Wolfgang Maier ba3a87aca3 bpo-33144: random.Random and subclasses: split _randbelow implementation (GH-6291) 2018-04-17 08:16:17 -07:00
Wolfgang Maier 091e95e900 bpo-33203: Ensure random.choice always raises IndexError on empty sequence (GH-6338) 2018-04-05 08:19:44 -07:00
Raymond Hettinger 132a7d7cdb bpo-31482: Missing bytes support for random.seed() version 1 (#3614) 
bpo-31482: Missing bytes support for random.seed() version 1 #3614
 2017-09-17 09:04:30 -07:00
Raymond Hettinger f5ea83f486 random_triangular: sqrt() is more accurate than **0.5 (#3317) 2017-09-04 16:51:06 -07:00
leodema 9f396b605e fix comment (#1798) 2017-06-04 07:41:41 +01:00
Gregory P. Smith 163468a766 bpo-16500: Don't use string constants for os.register_at_fork() behavior (#1834) 
Instead use keyword only arguments to os.register_at_fork for each of the scenarios.
Updates the documentation for clarity.
 2017-05-29 10:03:41 -07:00
Antoine Pitrou 346cbd351e bpo-16500: Allow registering at-fork handlers (#1715) 
* bpo-16500: Allow registering at-fork handlers

* Address Serhiy's comments

* Add doc for new C API

* Add doc for new Python-facing function

* Add NEWS entry + doc nit
 2017-05-27 17:50:54 +02:00
Raymond Hettinger bb2839b680 Issue #29055: Suppress upstream exception for random.choice() 2016-12-27 01:06:52 -08:00
Raymond Hettinger bf87126a63 Issue 28475: Improve error message for random.sample() with k < 0. (Contributed by Francisco Couzo). 2016-11-21 14:34:33 -08:00
Raymond Hettinger 24e4239434 Fix typos 2016-11-13 00:42:56 -05:00
Raymond Hettinger 8567e58ae3 Minor code beautification 2016-11-01 22:23:11 -07:00
Raymond Hettinger 30d00e54dd Issue #18844: Make the various ways for specifing weights produce the same results. 2016-10-29 16:55:36 -07:00