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SF #1027105: HardwareRandom should be renamed OSRandom

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Renamed the new generator at Trevor's recommendation.
The name HardwareRandom suggested a bit more than it
delivered (no radioactive decay detectors or such).
This commit is contained in:
Raymond Hettinger 2004-09-13 22:23:21 +00:00
parent 3e773fb622
commit 23f1241dc6
3 changed files with 24 additions and 20 deletions
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24
Lib/random.py
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@ -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 --------------------