Reference

Chris Angelico rosuav at gmail.com
Tue Mar 4 16:25:57 CET 2014


On Wed, Mar 5, 2014 at 2:19 AM, Jerry Hill <malaclypse2 at gmail.com> wrote:
> Out of curiosity, do you think we should be doing truth checking with
> 'is'?  True and False are singletons, and it seems to me that the
> justification for idenity versus equality should be just as strong
> there, but I don't think I've ever seen anyone even suggest that.

Normal truth testing is done like this:

if cond:

This isn't truth testing, this is checking the identity of what's in cond:

if cond is True:

And that's specifically testing for something much tighter than
truthiness. As you can see from my stats above, that's actually fairly
rare. Usually you'd just accept that True, 1, "yes", [1,2,3], and
1.2345 are all equally true.

ChrisA



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