Author terry.reedy
Recipients gvanrossum, josh.r, serhiy.storchaka, steven.daprano, terry.reedy, xtreak
Date 2019-01-11.21:49:58
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Message-id <1547243399.0.0.0024617686523.issue35712@roundup.psfhosted.org>
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I consider it a nice feature of Python that all builtin objects, and, AFAIK (and Josh, apparently), all stdlib class instances, have a boolean value.  (I am aware of numpy's element-wise behavior.)  I hate to give this up.  This is part of Python's general avoidance of singular exceptions and exceptions to exceptions.  This proposal would be the latter: "An object is truthy, unless its class makes it false, unless it is NotImplemented and a TypeError."

If this exception is made, I expect that there will be proposals to extend the exception to other objects, such as Ellipsis.
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Date User Action Args
2019-01-11 21:50:00terry.reedysetrecipients: + terry.reedy, gvanrossum, steven.daprano, serhiy.storchaka, josh.r, xtreak
2019-01-11 21:49:58terry.reedysetmessageid: <1547243399.0.0.0024617686523.issue35712@roundup.psfhosted.org>
2019-01-11 21:49:58terry.reedylinkissue35712 messages
2019-01-11 21:49:58terry.reedycreate