A Revised Rational Proposal

John Roth newsgroups at jhrothjr.com
Sun Dec 26 19:03:22 CET 2004


"Steven Bethard" <steven.bethard at gmail.com> wrote in message 
news:iWCzd.19458$k25.5585 at attbi_s53...
> Dan Bishop wrote:
>> Mike Meyer wrote:
>>>
>>>PEP: XXX
>>
>> I'll be the first to volunteer an implementation.
>
> Very cool.  Thanks for the quick work!
>
> For stdlib acceptance, I'd suggest a few cosmetic changes:
>
> Use PEP 257[1] docstring conventions, e.g. triple-quoted strings.
>
> Use PEP 8[2] naming conventions, e.g. name functions from_exact_float, 
> approx_smallest_denominator, etc.
>
> The decimal and math modules should probably be imported as _decimal and 
> _math.  This will keep them from showing up in the module namespace in 
> editors like PythonWin.
>
> I would be inclined to name the instance variables _n and _d instead of 
> the double-underscore versions.  There was a thread a few months back 
> about avoiding overuse of __x name-mangling, but I can't find it.  It also 
> might be nice for subclasses of Rational to be able to easily access _n 
> and _d.

I'd suggest making them public rather than either protected or
private. There's a precident with the complex module, where
the real and imaginary parts are exposed as .real and .imag.

John Roth

>
> Thanks again for your work!
>
> Steve
>
> [1] http://www.python.org/peps/pep-0257.html
> [2] http://www.python.org/peps/pep-0008.html 




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