[Python-Dev] transitioning from % to {} formatting (original) (raw)

Terry Reedy tjreedy at udel.edu
Sat Oct 3 03:39:11 CEST 2009

Steven Bethard wrote:

On Thu, Oct 1, 2009 at 10:49 PM, Terry Reedy <tjreedy at udel.edu> wrote:

As someone who likes .format() and who already uses such bound methods to print, such as in

emsg = "...".format ... if c: print(emsg(arg, barg)) I find this MUCH preferable to the ugly and seemingly unnecessary wrapper class idea being bandied about. This would be scarcely worse than passing the string itself. But it's not much of a transition plan.

It is a 'plan' to transition from not being able to use the new formatting, which I prefer, throughout the stdlib, to being able to do so.

I believe most, even if not all, find that acceptable. Certainly, I think you should be able to implement the above for argparse before submitting it. And I would hope that 3.2, in a year, is generally .format usable.

This is the first step in a possible long-term replacement, but there is currently no consensus to do any more than this. So I think it premature to do any more. I would agree, for instance, that an auto-translation tool is needed.

Terry Jan Reedy

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