[Python-Dev] converting the stdlib to str.format
Michael Foord
fuzzyman at voidspace.org.uk
Wed Jun 4 13:36:48 CEST 2008
Nick Coghlan wrote:
> Martin v. Löwis wrote:
>>>> Please don't - not before % is actually deprecated (which I hope won't
>>>> happen until Python 4, with removal of % in Python 5, in the year
>>>> when I retire, i.e. 2037).
>>> Now this is news to me -- was there a discussion that changed the
>>> lifetime expectancy of str.__mod__? I'd always supposed it being
>>> deprecated at some point in 3.x.
>>
>> The PEP doesn't specify anything, and I don't recall any discussion,
>> either - the specific timing suggested above is merely my own hopes.
>
> While str.format has an awful lot of points in its favour (no
> tuple/dict special casing, much cleaner handling of named arguments,
> access to format options for non-builtin types), there are some
> debugging cases where I suspect the basic version of % formatting will
> prove to be more convenient.
>
> At this point in time, my personal preference would be that later in
> the 3.x series certain aspects of % formatting will be deprecated
> (acceptance of non-tuples in favour of the format() builtin,
> acceptance of dicts in favour of str.format), but that simple %
> formatting of a tuple of values will still be permitted.
>
+1
Simple string formatting with %s and a single object or a tuple meets
>90% of my string formatting needs.
Michael Foord
> Cheers,
> Nick.
>
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