On 08/10/2015 02:44 PM, Yury Selivanov wrote: > > > On 2015-08-10 2:37 PM, Eric V. Smith wrote: >>> Besides, any expression you have to calculate can go in a local that >>> will get >>> >interpolated. The same goes for any !r or other formatting >>> modifiers. In an >>> >i18n context, you want to stick to the simplest possible substitution >>> >placeholders. >> This is why I think PEP-498 isn't the solution for i18n. I'd really like >> to be able to say, in a debugging context: >> >> print('a:{self.a} b:{self.b} c:{self.c} d:{self.d}') >> >> without having to create locals to hold these 4 values. > > Why can't we restrict expressions in f-strings to > attribute/item getters? > > I.e. allow f'{foo.bar.baz}' and f'{self.foo["bar"]}' but > disallow f'{foo.bar(baz=something)}' It's possible. But my point is that Barry doesn't even want attribute/item getters for an i18n solution, and I'm not willing to restrict it that much. Eric.
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