diff options
Diffstat (limited to 'Lib/random.py')
| -rw-r--r-- | Lib/random.py | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/Lib/random.py b/Lib/random.py index 06990d2..fd9374a 100644 --- a/Lib/random.py +++ b/Lib/random.py @@ -43,7 +43,7 @@ from warnings import warn as _warn from types import MethodType as _MethodType, BuiltinMethodType as _BuiltinMethodType from math import log as _log, exp as _exp, pi as _pi, e as _e from math import sqrt as _sqrt, acos as _acos, cos as _cos, sin as _sin -from math import floor as _floor +from math import floor as _floor, ldexp as _ldexp __all__ = ["Random","seed","random","uniform","randint","choice","sample", "randrange","shuffle","normalvariate","lognormvariate", @@ -63,13 +63,11 @@ try: from binascii import hexlify as _hexlify except ImportError: _urandom = None -else: - _tofloat = 2.0 ** (-7*8) # converts 7 byte integers to floats # Translated by Guido van Rossum from C source provided by # Adrian Baddeley. Adapted by Raymond Hettinger for use with -# the Mersenne Twister core generator. +# the Mersenne Twister and os.urandom() core generators. import _random @@ -761,7 +759,7 @@ class HardwareRandom(Random): """Get the next random number in the range [0.0, 1.0).""" if _urandom is None: raise NotImplementedError('Cannot find hardware entropy source') - return long(_hexlify(_urandom(7)), 16) * _tofloat + return _ldexp(long(_hexlify(_urandom(7)), 16) >> 3, -BPF) def getrandbits(self, k): """getrandbits(k) -> x. Generates a long int with k random bits.""" |