Mercurial > p > roundup > code

annotate roundup/anypy/random_.py @ 7228:07ce4e4110f5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
flake8 fixes: whitespace, remove unused imports
author John Rouillard <rouilj@ieee.org>
date Sat, 18 Mar 2023 14:16:31 -0400
parents adf54478cdaf
children f002747b6773
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
1 try:
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
2 from secrets import choice, randbelow, token_bytes
6029
adf54478cdaf flake8 cleanup: whitspeace format changes.
John Rouillard <rouilj@ieee.org>
parents: 5488
diff changeset
3
adf54478cdaf flake8 cleanup: whitspeace format changes.
John Rouillard <rouilj@ieee.org>
parents: 5488
diff changeset
4 def seed(v=None):
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
5 pass
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
6
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
7 is_weak = False
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
8 except ImportError:
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
9 import os as _os
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
10 import random as _random
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
11
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
12 # prefer to use SystemRandom if it is available
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
13 if hasattr(_random, 'SystemRandom'):
6029
adf54478cdaf flake8 cleanup: whitspeace format changes.
John Rouillard <rouilj@ieee.org>
parents: 5488
diff changeset
14 def seed(v=None):
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
15 pass
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
16
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
17 _r = _random.SystemRandom()
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
18 is_weak = False
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
19 else:
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
20 # don't completely throw away the existing state, but add some
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
21 # more random state to the existing state
6029
adf54478cdaf flake8 cleanup: whitspeace format changes.
John Rouillard <rouilj@ieee.org>
parents: 5488
diff changeset
22 def seed(v=None):
7228
07ce4e4110f5 flake8 fixes: whitespace, remove unused imports
John Rouillard <rouilj@ieee.org>
parents: 6029
diff changeset
23 import os
07ce4e4110f5 flake8 fixes: whitespace, remove unused imports
John Rouillard <rouilj@ieee.org>
parents: 6029
diff changeset
24 import time
5488
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
25 _r.seed((_r.getstate(),
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
26 v,
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
27 hasattr(os, 'getpid') and os.getpid(),
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
28 time.time()))
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
29
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
30 # create our own instance so we don't mess with the global
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
31 # random number generator
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
32 _r = _random.Random()
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
33 seed()
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
34 is_weak = True
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
35
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
36 choice = _r.choice
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
37
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
38 def randbelow(i):
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
39 return _r.randint(0, i - 1)
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
40
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
41 if hasattr(_os, 'urandom'):
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
42 def token_bytes(l):
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
43 return _os.urandom(l)
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
44 else:
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
45 def token_bytes(l):
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
46 _bchr = chr if str == bytes else lambda x: bytes((x,))
52cb53eedf77 reworked random number use
Christof Meerwald <cmeerw@cmeerw.org>
parents:
diff changeset
47 return b''.join([_bchr(_r.getrandbits(8)) for i in range(l)])
Roundup Issue Tracker: http://roundup-tracker.org/