New submission from Maciej Górski <[email protected]>:
When an empty expression is provided in curly brackets inside an f-string we
get Syntax Error: "f-string: empty expression not allowed".
This is correct, however error with the same message is raised in the following
cases: f"{!foo}", f"{!}", f"{:bar}", f"{=}", etc.
For example, should someone make an error and try to negate an expression with
'!' instead of 'not' (i.e. f"{!True}"), they would get a confusing error,
saying that the expression is empty, when it isn't.
I propose we raise an error with the message: "f-string: optional specifier
'%c' must follow a non-empty expression.
----------
components: Parser
messages: 416069
nosy: lys.nikolaou, macgors, pablogsal
priority: normal
severity: normal
status: open
title: Improve errors messages in f-string syntax errors
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Python tracker <[email protected]>
<https://bugs.python.org/issue47129>
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