Mark Dickinson <dicki...@gmail.com> added the comment:

> a double-check that the behaviour change is desirable

I'm not sure I'm brave or foolhardy enough to try to figure out what all of the 
special case results *should* be for complex pow. The special cases seem 
reasonably clear cut for everything else in the cmath module, but for pow it's 
pretty much going to be a nightmare. I'm not sure there's much Python can do 
here in the way of guarantees, other than "not obviously horribly wrong". (And 
while I have reasonable confidence we can achieve the "not obviously horribly 
wrong" goal for everything else, I still have doubts for pow.)

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44698>
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