Łukasz Rekucki <lreku...@gmail.com> added the comment:
I see a problem with silently converting types without __format__() using
str(). The user may write `"{:10s}".format(some_obj)`, which will work as long
as some_obj doesn't have a formatter of it's own. If I later on, decide I want
to add some custom formating to that object, there is a large chance I'll break
a lot of code, 'cause doing it in backward-compatible way seems very difficult.
----------
nosy: +lrekucki
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue5965>
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