Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:
I think there is a slim chance of implementing similar feature in future. If
once we implement pytest-like asserts, we will need to add special expression
evaluator which saves all intermediate results of subexpressions and pass them
to some hook (together with string representation of subexpressions). The same
evaluator with different hook could be used for "="-substitutions in f-strings.
So {a+b-c=} could be evaluated to "a=20, b=40, a+b=60, c=10, a+b-c=50". But it
is too early to talk about it.
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<https://bugs.python.org/issue43695>
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