Message163546
I think *both* proposals are sensible. Fraction already has .from_decimal (using Decimal), so .to_decimal (also using Decimal) is sensible. It also has .from_float, with 'f.to_float' spelled f.__float__, normally called as float(f).
On the other hand, part of the point of the new format system was/is to allow 'other' classes to tie into format specs with custom .__format__. Currently, Fraction inherits .__format__ from object, which only recognizes 's' specifications. (Anything else gives a misleading 'str' error message that is the subject of another issue.) I think it should get a custom .__format__, which could use f.to_decimal(prec), where prec is calculated from the format spec. |
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2012-06-23 08:11:10 | terry.reedy | set | recipients:
+ terry.reedy, rhettinger, mark.dickinson, eric.smith, skrah, joncle, Ramchandra Apte |
2012-06-23 08:11:08 | terry.reedy | set | messageid: <1340439068.09.0.720536176153.issue15136@psf.upfronthosting.co.za> |
2012-06-23 08:11:07 | terry.reedy | link | issue15136 messages |
2012-06-23 08:11:02 | terry.reedy | create | |
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