[issue12986] Using getrandbits() in uuid.uuid4() is faster and more readable
report at bugs.python.org
Sat Apr 7 22:06:38 CEST 2012
Antoine Pitrou <pitrou at free.fr> added the comment:
> However, I'm not sure of the legitimacy of replacement suitable for
> cryptographic use `os.urandom` on fast pseudo-random
> `random.getrandbits`. Especially for applications that need to generate
> a lot of uuids.
Agreed. urandom() is supposed to incorporate "real" random, while getrandbits() uses a PRNG.
Also, as the OP shows, it's easy to inject your own random source:
>>> grb = "uuid.UUID(int=random.getrandbits(128), version=4)"
if you really need the speed.
stage: -> patch review
versions: +Python 3.3 -Python 3.2
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