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annotate roundup/anypy/random_.py @ 6757:f6dd6cd920bc

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Split edit ok and edit not ok test into two tests. Having them combined seems to cause them to fail in CI. Will splitting them with separate setup for each work better?
author John Rouillard <rouilj@ieee.org>
date Tue, 05 Jul 2022 02:02:38 -0400
parents adf54478cdaf
children 07ce4e4110f5
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1 try:
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2 from secrets import choice, randbelow, token_bytes
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3
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4 def seed(v=None):
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5 pass
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6
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7 is_weak = False
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8 except ImportError:
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9 import os as _os
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10 import random as _random
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11
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12 # prefer to use SystemRandom if it is available
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13 if hasattr(_random, 'SystemRandom'):
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14 def seed(v=None):
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15 pass
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16
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17 _r = _random.SystemRandom()
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18 is_weak = False
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19 else:
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20 # don't completely throw away the existing state, but add some
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21 # more random state to the existing state
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22 def seed(v=None):
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23 import os, time
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24 _r.seed((_r.getstate(),
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25 v,
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26 hasattr(os, 'getpid') and os.getpid(),
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27 time.time()))
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28
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29 # create our own instance so we don't mess with the global
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30 # random number generator
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31 _r = _random.Random()
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32 seed()
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33 is_weak = True
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34
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35 choice = _r.choice
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36
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37 def randbelow(i):
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38 return _r.randint(0, i - 1)
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39
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40 if hasattr(_os, 'urandom'):
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41 def token_bytes(l):
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42 return _os.urandom(l)
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43 else:
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44 def token_bytes(l):
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45 _bchr = chr if str == bytes else lambda x: bytes((x,))
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46 return b''.join([_bchr(_r.getrandbits(8)) for i in range(l)])
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