[Python-Dev] PEP 498: Literal String Interpolation is ready for pronouncement (original) (raw)

Eric V. Smith eric at trueblade.com
Sat Sep 5 22:43:52 CEST 2015

On 9/5/2015 12:18 PM, Guido van Rossum wrote:

On Sat, Sep 5, 2015 at 2:10 AM, haypo s <victor.stinner at gmail.com_ _<mailto:victor.stinner at gmail.com>> wrote:

(is it possible to indent and comment code inside a f-string?)

Now that's an interesting question. I think the answer must be No, because we don't want to deal with ambiguities like whether a closing curly bracket or string quote should be ignored inside such comments. The processing of f-strings described by the PEP uses several phases:

I'll update the PEP to say comments aren't allowed. It gets especially wacky when adding () around the expression: f'{2#}' would become the expression "(2#)", which is a syntax error.

Eric.

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