How to guard against bugs like this one?

Mark Dickinson dickinsm at
Tue Feb 2 10:20:59 CET 2010

On Feb 2, 3:28 am, Steven D'Aprano
<ste... at> wrote:
> There is no module numbers in the standard library, at least not in 2.5.

It's new in 2.6 (and 3.0, I think;  it's there in 3.1, anyway).  It
provides abstract base classes for numeric types;  see the fractions
module source for some of the ways it can be used.  Here are the docs:

and also PEP 3141, on which it's based:


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