Message 384970 - Python tracker

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Author	gvanrossum
Recipients	Mark.Shannon, Mohamed_Atef, ethan.furman, gregory.p.smith, gvanrossum, pablogsal, serhiy.storchaka, stestagg
Date	2021-01-12.18:09:13
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1610474953.15.0.916420769997.issue42899@roundup.psfhosted.org>
In-reply-to

Content
Hm, I hadn't realized the issue of bool(a) being evaluated once or twice. The most important side effect that bool(a) can have is raising (as e.g. numpy arrays do), not producing random results. Another important side effect might be loading some value into a cache. So I think dropping an extra call is fine, while dropping the only call is not.

Hm, I hadn't realized the issue of bool(a) being evaluated once or twice.

The most important side effect that bool(a) can have is raising (as e.g. numpy arrays do), not producing random results. Another important side effect might be loading some value into a cache.

So I think dropping an *extra* call is fine, while dropping the *only* call is not.

History
Date	User	Action	Args
2021-01-12 18:09:13	gvanrossum	set	recipients: + gvanrossum, gregory.p.smith, ethan.furman, Mark.Shannon, serhiy.storchaka, Mohamed_Atef, pablogsal, stestagg
2021-01-12 18:09:13	gvanrossum	set	messageid: <1610474953.15.0.916420769997.issue42899@roundup.psfhosted.org>
2021-01-12 18:09:13	gvanrossum	link	issue42899 messages
2021-01-12 18:09:13	gvanrossum	create