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annotate roundup/anypy/random_.py @ 7178:db06d4aeb978

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unshadow stdlib token from roundup's token. This bites me every now and again when running pytest and pdb. Some submodules want to load the stdlib python and end up getting roundup's python and thing break with N_TOKENS not defined etc. So rename token.py to token_r.py (token_r(oundup)... hey naming things is hard) an change code as needed.
author John Rouillard <rouilj@ieee.org>
date Sun, 26 Feb 2023 12:00:35 -0500
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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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)])
Roundup Issue Tracker: http://roundup-tracker.org/