diff options
Diffstat (limited to 'Lib/random.py')
| -rw-r--r-- | Lib/random.py | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/Lib/random.py b/Lib/random.py index 62f5905..c57dc2b 100644 --- a/Lib/random.py +++ b/Lib/random.py @@ -42,7 +42,6 @@ from types import MethodType as _MethodType, BuiltinMethodType as _BuiltinMethod from math import log as _log, exp as _exp, pi as _pi, e as _e, ceil as _ceil from math import sqrt as _sqrt, acos as _acos, cos as _cos, sin as _sin from os import urandom as _urandom -from binascii import hexlify as _hexlify import collections as _collections __all__ = ["Random","seed","random","uniform","randint","choice","sample", @@ -97,16 +96,16 @@ class Random(_random.Random): None or no argument seeds from current time or from an operating system specific randomness source if available. - For version 2 (the default), all of the bits are used if a is a str, - bytes, or bytearray. For version 1, the hash() of a is used instead. + For version 2 (the default), all of the bits are used if *a *is a str, + bytes, or bytearray. For version 1, the hash() of *a* is used instead. - If a is an int, all bits are used. + If *a* is an int, all bits are used. """ if a is None: try: - a = int(_hexlify(_urandom(16)), 16) + a = int.from_bytes(_urandom(32), 'big') except NotImplementedError: import time a = int(time.time() * 256) # use fractional seconds @@ -114,7 +113,7 @@ class Random(_random.Random): if version == 2 and isinstance(a, (str, bytes, bytearray)): if isinstance(a, str): a = a.encode("utf8") - a = int(_hexlify(a), 16) + a = int.from_bytes(a, 'big') super().seed(a) self.gauss_next = None @@ -139,7 +138,7 @@ class Random(_random.Random): internalstate = tuple(x % (2**32) for x in internalstate) except ValueError as e: raise TypeError from e - super(Random, self).setstate(internalstate) + super().setstate(internalstate) else: raise ValueError("state with version %s passed to " "Random.setstate() of version %s" % @@ -613,7 +612,7 @@ class Random(_random.Random): # Jain, pg. 499; bug fix courtesy Bill Arms u = 1.0 - self.random() - return alpha * pow(-_log(u), 1.0/beta) + return alpha * (-_log(u)) ** (1.0/beta) ## --------------- Operating System Random Source ------------------ @@ -627,7 +626,7 @@ class SystemRandom(Random): def random(self): """Get the next random number in the range [0.0, 1.0).""" - return (int(_hexlify(_urandom(7)), 16) >> 3) * RECIP_BPF + return (int.from_bytes(_urandom(7), 'big') >> 3) * RECIP_BPF def getrandbits(self, k): """getrandbits(k) -> x. Generates a long int with k random bits.""" @@ -636,7 +635,7 @@ class SystemRandom(Random): if k != int(k): raise TypeError('number of bits should be an integer') bytes = (k + 7) // 8 # bits / 8 and rounded up - x = int(_hexlify(_urandom(bytes)), 16) + x = int.from_bytes(_urandom(bytes), 'big') return x >> (bytes * 8 - k) # trim excess bits def seed(self, *args, **kwds): |