[Python-Dev] Status regarding Old vs. Advanced String Formating
Ethan Furman
ethan at stoneleaf.us
Fri Feb 24 18:00:12 CET 2012
Tshepang Lekhonkhobe wrote:
> Hi,
>
> I was of the thought that Old String Formatting |"%s" % foo| was to be
> phased out by Advanced String Formatting |"{}.format(foo)|. I however
> keep seeing new code committed into the main VCS using the old style.
> Is this okay? Is there a policy? I ask also because I expect CPython
> to lead by example.
>
> On another note, will the old format ever be deprecated? Is there a date?
Brett Cannon wrote:
> On Tue, Feb 22, 2011 at 10:43, Ethan Furman wrote:
>
>> Greetings!
>>
>> According to these release notes in Python 3.0, %-formatting will be
>> going away.
>>
>>
http://docs.python.org/release/3.0.1/whatsnew/3.0.html#pep-3101-a-new-approach-to-string-formatting
>>
>> However, I was unable to find any further evidence of actual
>> deprecation in 3.1 or 3.2... does anybody know the status of this?
>>
>
> There isn't one. =)
>
> The very long term view is for %-formatting to go away, but that's as
> far as the thinking has gone. There are currently no plans to
> introduce any deprecation warning, and I highly doubt we will even
> remove the feature in Python 3, giving you probably at least another
> decade of use at our current major version release schedule. =)
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