[Python-Dev] How long the wrong type of argument should we limit (or not) in the error message (C-api)?

Ethan Furman ethan at stoneleaf.us
Sun Dec 15 17:33:30 CET 2013

On 12/14/2013 07:51 PM, Steven D'Aprano wrote:
> On Sun, Dec 15, 2013 at 11:25:10AM +1000, Nick Coghlan wrote:
>> Oh, yes, a %T shortcut for "length limited type name of the supplied
>> object" would be brilliant. We need this frequently for C level error
>> messages, and I almost always have to look at an existing example to
>> remember the exact incantation :)
> What are the chances that could be made available from pure Python too?
> Having to extract the name of the type is a very common need for error
> messages, and I never know whether I ought to write type(obj).__name__
> or obj.__class__.__name__. A %T and/or {:T} format code could be the One
> Obvious Way to include the type name in strings



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