Message 167348 - Python tracker

Message167348

Author	pitrou
Recipients	mark.dickinson, pitrou, skrah, steven.daprano
Date	2012-08-03.19:49:30
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1344023218.3377.10.camel@localhost.localdomain>
In-reply-to	<1344023256.24.0.235062758077.issue15544@psf.upfronthosting.co.za>

Content
> > Why not add a is_nan() method to float numbers instead? > > Do you mean replacing math.isnan(x) by x.is_nan() to avoid the issue > altogether? I'm not sure that's possible given that math just wraps > the C library. Yup. By calling x.is_nan() you would by construction get an implementation that's correct for x's type. If x is a float, it would obviously re-use math.isnan() (or have a similar implementation).

Content

> > Why not add a is_nan() method to float numbers instead?
> 
> Do you mean replacing math.isnan(x) by x.is_nan() to avoid the issue
> altogether? I'm not sure that's possible given that math just wraps
> the C library.

Yup. By calling x.is_nan() you would by construction get an
implementation that's correct for x's type. If x is a float, it would
obviously re-use math.isnan() (or have a similar implementation).

History
Date	User	Action	Args
2012-08-03 19:49:31	pitrou	set	recipients: + pitrou, mark.dickinson, steven.daprano, skrah
2012-08-03 19:49:31	pitrou	link	issue15544 messages
2012-08-03 19:49:30	pitrou	create