Roy Smith於 2011年12月26日星期一UTC+8上午1時41分29秒寫道： > On Mon, 26 Dec 2011 03:11:56 +1100, Chris Angelico wrote: > > > I prefer not to rely on the source. That tells me what happens, not > > > what's guaranteed to happen. > > Steven D'Aprano <steve+comp....@pearwood.info> wrote: > > In this case, the source explicitly tells you that the API includes > > support for arbitrary large ranges if you include a getrandbits() method: > > > > Optionally, implement a getrandbits() method so that randrange() > > can cover arbitrarily large ranges. > > > > I call that a pretty strong guarantee. > > I think you mis-understood Chris's point. The documentation is the > specification of how something behaves. If the documentation doesn't > say it, you can't rely on it. The user should never have to read the > source to know how to use a function, or what they can depend on. Now, > I'm not saying that reading the source isn't useful for a deeper > understanding, but it should be understood that any insights you glean > from doing that are strictly implementation details. > > If you're saying that there are guarantees made by the implementation of > getrandbits() which are not documented, then one of two things are true: > > 1) It is intended that users can depend on that behavior, in which case > it's a bug in the docs, and the docs should be updated. > > or > > 2) It is not intended that users can depend on that behavior, in which > case they would be foolish to do so.
Random bit generations for RSA2048 encoding and cryptography applications in python is simple and elegant. -- http://mail.python.org/mailman/listinfo/python-list
