[Terry Reedy]
However it is done, I think someone (like new Python programmers) should
be able to program in Python3, and use everything in the stdlib, without
ever learning % formatting -- and that I should be able to forget about
it ;-).
+10 on the goal.
If that were possible, it would be nice. But as long as the language supports
%-formatting, it is going to be around in one form or another. Any non-casual
user will bump into %-formatting in books, in third-party modules, in ASPN recipes,
on the newsgroup, and in our own source code. If they maintain any exising
software, they will likely encounter too. It doesn't seem to be a subject that
can be ignored.
Also, I think it premature to say that {}-formatting has been proven in battle.
AFAICT, there has been very little uptake. I've personally made an effort
to use {}-formatting more often but find that I frequently have to lookup
the syntax and need to experiment with the interactive interpreter to get it
right.
I haven't found it easy to teach or to get other people to convert. This is
especially true if the person has encountered %-formatting in other languages
(it is a popular approach).
Raymond
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