f-string

[Chris Angelico]

On Wed, Dec 6, 2017 at 8:24 PM, Steve D'Aprano
<steve+python at pearwood.info> wrote:
> On Wed, 6 Dec 2017 12:21 pm, Chris Angelico wrote:
>
>> On Wed, Dec 6, 2017 at 11:54 AM, John Pote <johnpote at jptechnical.co.uk>
>> wrote:
>>>
>>> On 06/12/2017 00:16, Steve D'Aprano wrote:
>>>>
>>>> Anyone got a handy copy of Python 3.6 available to test something for me?
>>>>
>>>> What does compile('f"{spam} {eggs}"', '', 'single') return?
>
> [...]
>
>> I think Steve just wanted to see what we'd all define spam and eggs as.
>>
>> ChrisA
>> *ducking for cover*
>
> Possibly duck eggs :-)
>
>
> I was thinking of responding to your comment on Python-Ideas that said there
> is no way to represent an unevaluated f-string in Python, but then I decided
> that even for me that was too pedantic.
>

Considering that it isn't an object, it'd be on par with saying that there's no
 way to represent an unevaluated "if-else" expression. You can wrap it in a
function and carry that function around, or you can use the source code and
then exec it when you need it, but neither of those really represents an
unevaluated f-string - they represent something else that might be equivalent.
So yeah, even for the great D'Aprano, that would be a bit too pedantic. :)

ChrisA