On Tue, Apr 6, 2021 at 3:46 AM Terry Reedy <[email protected]> wrote:
> *While 'a and not a' == False in logic, in Python it might raise
> NameError. But that would still mean that it is never True, making
> 'yield 0' still unreachable.
>
And even just the lookup can have side effects, if your code is
pathologically stupid.
>>> class Wat(dict):
... def __missing__(self, key):
... global count
... count -= 1
... return count
...
>>> count = 2
>>> eval("print(a and not a)", Wat(print=print))
True
So Python can't afford to treat this as dead code.
ChrisA
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