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author | Raymond Hettinger <python@rcn.com> | 2004-09-13 22:23:21 (GMT) |
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committer | Raymond Hettinger <python@rcn.com> | 2004-09-13 22:23:21 (GMT) |
commit | 23f1241dc6495eb255e1a389aef204a3e35a2632 (patch) | |
tree | 36ba60b6ea16729a8da357dde30b86de6ea55d9c /Lib/random.py | |
parent | 3e773fb6225a9da6fd3f45bad9ead3baa8979f02 (diff) | |
download | cpython-23f1241dc6495eb255e1a389aef204a3e35a2632.zip cpython-23f1241dc6495eb255e1a389aef204a3e35a2632.tar.gz cpython-23f1241dc6495eb255e1a389aef204a3e35a2632.tar.bz2 |
SF #1027105: HardwareRandom should be renamed OSRandom
Renamed the new generator at Trevor's recommendation.
The name HardwareRandom suggested a bit more than it
delivered (no radioactive decay detectors or such).
Diffstat (limited to 'Lib/random.py')
-rw-r--r-- | Lib/random.py | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/Lib/random.py b/Lib/random.py index 46a1b1f..f355eac 100644 --- a/Lib/random.py +++ b/Lib/random.py @@ -52,7 +52,7 @@ __all__ = ["Random","seed","random","uniform","randint","choice","sample", "expovariate","vonmisesvariate","gammavariate", "gauss","betavariate","paretovariate","weibullvariate", "getstate","setstate","jumpahead", "WichmannHill", "getrandbits", - "HardwareRandom"] + "SystemRandom"] NV_MAGICCONST = 4 * _exp(-0.5)/_sqrt(2.0) TWOPI = 2.0*_pi @@ -99,8 +99,8 @@ class Random(_random.Random): def seed(self, a=None): """Initialize internal state from hashable object. - None or no argument seeds from current time or from a hardware - randomness source if available. + None or no argument seeds from current time or from an operating + system specific randomness source if available. If a is not None or an int or long, hash(a) is used instead. """ @@ -603,8 +603,8 @@ class WichmannHill(Random): def seed(self, a=None): """Initialize internal state from hashable object. - None or no argument seeds from current time or from a hardware - randomness source if available. + None or no argument seeds from current time or from an operating + system specific randomness source if available. If a is not None or an int or long, hash(a) is used instead. @@ -744,10 +744,12 @@ class WichmannHill(Random): z = (z + a) % 256 or 1 self.__whseed(x, y, z) -## -------------------- Hardware Random Source ------------------- +## --------------- Operating System Random Source ------------------ -class HardwareRandom(Random): - """Alternate random number generator using hardware sources. +class SystemRandom(Random): + """Alternate random number generator using sources provided + by the operating system (such as /dev/urandom on Unix or + CryptGenRandom on Windows). Not available on all systems (see os.urandom() for details). """ @@ -767,13 +769,13 @@ class HardwareRandom(Random): return x >> (bytes * 8 - k) # trim excess bits def _stub(self, *args, **kwds): - "Stub method. Not used for a hardware random number generator." + "Stub method. Not used for a system random number generator." return None seed = jumpahead = _stub def _notimplemented(self, *args, **kwds): - "Method should not be called for a hardware random number generator." - raise NotImplementedError('Hardware entropy source does not have state.') + "Method should not be called for a system random number generator." + raise NotImplementedError('System entropy source does not have state.') getstate = setstate = _notimplemented ## -------------------- test program -------------------- |