Re: [Python-ideas] Should __builtins__ have some kind of pass-through print function, for debugging?

On Fri, Apr 27, 2018 at 6:24 PM Nick Coghlan wrote:

On 27 April 2018 at 21:27, Steven D'Aprano wrote:

...

Obviously dp() would have to be magic. There's no way that I know of for a Python function to see the source code of its own arguments. I have no idea what sort of deep voodoo would be required to make this work. But if it could work, wow, that would really be useful. And not just for beginners.

If you relax the enhancement to just noting the line where the debug print came from, it doesn't need to be deep compiler magic - the same kind of stack introspection that warnings and tracebacks use would suffice. (Stack introspection to find the caller's module, filename and line number, linecache to actually retrieve the line if we want to print that).

I​ spent a bit of time and now there's a dprint https://pypi.org/p/dprint project on PyPI. It uses stack introspection to print out some details. If someone wants to take it for a spin and provide feedback on how it feels, this thread is as good a place as any, I suppose. :) Cheers, Pradyun

Cheers, Nick.

P.S. While super() is a *little* magic, it isn't *that* magic - it gets converted from "super()" to "super(name_of_first_param, __class__)". And even that limited bit of magic has proven quirky enough to be a recurring source of irritation when it comes to interpreter maintenance.

-- Nick Coghlan | ncoghlan@gmail.com | Brisbane, Australia _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/

-- -- Pradyun