[Christian Tanzer]
How do you suppose that maintainers could ever do the transition from
%- to {}-formatting manually?
[Guido van Rossum]
This is pretty much the situation with integer division (you can only
recognize it by running the code),
Do you think there may be some possible parallel to the -3 option
to flag cases of %-formatting? If so, that could be helpful.
So, yes, we will continue to make noise about this. And yes you should
opportunistically migrate your code to {}-formatting, like when you're
rewriting some code anyway. One of the nice things about {}-formatting
is that in most cases (things like the logging API excluded) you can
change it one format string at a time.
I've already have some code that mixes the styles (using {} for new stuff).
Raymond
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