[issue32954] Lazy Literal String Interpolation (PEP-498-based fl-strings)

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpyt...@gmail.com> added the comment:

class FL:
    def __init__(self, func):
        self.func = func
    def __str__(self):
        return self.func()

extra = FL(lambda: f'{extra},waiters:{len(self._waiters)}')

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nosy: +serhiy.storchaka

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<https://bugs.python.org/issue32954>
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