[issue9025] Non-uniformity in randrange for large arguments.

Antoine Pitrou report at bugs.python.org
Wed Jun 23 16:37:18 CEST 2010


Antoine Pitrou <pitrou at free.fr> added the comment:

This wouldn't be the first time reproduceability is dropped, since reading from the docs:

“As an example of subclassing, the random module provides the WichmannHill class that implements an alternative generator in pure Python. The class provides a backward compatible way to reproduce results from earlier versions of Python, which used the Wichmann-Hill algorithm as the core generator.”

Also:

> FWIW, we spent ten years maintaining the ability to reproduce
> sequences.  It has become an implicit promise.

IMO it should either be documented explicitly, or be taken less dearly. There's not much value in an "implicit promise" that's only known by a select few.

(besides, as Terry said, I think most people are more concerned by the quality of the random distribution than by the reproduceability of sequences)

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nosy: +pitrou

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