[Python-Dev] Status regarding Old vs. Advanced String Formating

Mark Lawrence breamoreboy at yahoo.co.uk
Sat Feb 25 21:16:13 CET 2012


On 25/02/2012 13:13, Mark Lawrence wrote:
> On 25/02/2012 05:55, Nick Coghlan wrote:
>> On Sat, Feb 25, 2012 at 10:23 AM, Mark
>> Lawrence<breamoreboy at yahoo.co.uk> wrote:
>>
>>> <quote>
>>> Quoting the docs http://docs.python.org/py3k/library/stdtypes.html
>>>
>>> 4.6.2. Old String Formatting Operations
>>>
>>> Note
>>>
>>> The formatting operations described here are obsolete and may go away in
>>> future versions of Python. Use the new String Formatting in new code.
>>>
>>> </quote>
>>>
>>> I think this is daft because all of the code has to be supported for
>>> the ten
>>> years that MVL has suggested.
>>
>> Indeed, that note was written before we decided that getting rid of
>> "%" formatting altogether would be a bad idea.
>>
>> It would be better to update it to say something like:
>>
>> "The formatting operations described here are modelled on C's printf()
>> syntax. They only support formatting of certain builtin types, and the
>> use of a binary operator means that care may be needed in order to
>> format tuples and dictionaries correctly. As the new string formatting
>> syntax is more powerful, flexible, extensible and handles tuples and
>> dictionaries naturally, it is recommended for new code. However, there
>> are no current plans to deprecate printf-style formatting."
>>
>> Cheers,
>> Nick.
>>
>
> That's fine by me, it'll save me changing my own code. I'll put this on
> the issue tracker if you want, but after the pressing needs of the bar
> and 6 Nations rugby :)
>

I would raise this on the issue tracker but it won't let me login. 
Guess I'm not wanted. :(

-- 
Cheers.

Mark Lawrence.



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