[Python-Dev] PEP-498: Literal String Formatting

Sven R. Kunze srkunze at mail.de
Tue Aug 11 19:25:15 CEST 2015

Couldn't you just store the original format string at some 
__format_str__ attribute at the formatted string? Just in case you need it.

x = f'{a}'


x = '{}'.format(a) # or whatever it turns out to be
x.__format_str__ = '{a}'

On 11.08.2015 17:16, Eric V. Smith wrote:
> On 08/11/2015 11:09 AM, Alexander Walters wrote:
>> This may seam like a simplistic solution to i18n, but why not just add a
>> method to string objects (assuming we implement f-strings) that just
>> returns the original, unprocessed string.  If the string was not an
>> f-string, it just returns self.  The gettext module can be modified, I
>> think trivially, to use the method instead of the string directly.
> You need the original string, in order to figure out what it translates
> to. You need the values to replace into that string, evaluated at
> runtime, in the context of where the string appears. And you need to
> know where in the original (or translated) string to put them.
> The problem is that there's no way to evaluate the values and, before
> they're substituted in to the string, use a different template string
> with obvious substitution points. This is what PEP 501 is trying to do.
> Eric.
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