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Thu Nov 30 11:31:56 EST 2017 · https://mail.python.org/pipermail/python-dev/2017-November/150985.html

On Thu, Nov 30, 2017, at 11:08, Eric Fahlgren wrote:
> On Thu, Nov 30, 2017 at 2:48 AM, Andrea Griffini <agriff at tin.it> wrote:
> 
> > Not really related but the PEP says that arguments in Python are evaluated
> > before the function (as a reason to reject the idea of None-aware function
> > call) but this is not the case:
> >
> 
> I think you're missing something here, since it seems clear to me that
> indeed the arguments are evaluated prior to the function call.  Maybe
> unrolling it would help?  This is equivalent to the body of your lambda,
> and you can see that the argument is evaluated prior to the call which
> receives it.

Of course they're evaluated prior to the function *call*, but the pep
says they're evaluated prior to the function *itself* [i.e. arg = g();
func = f(); func(arg)].

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Showing content from https://mail.python.org/pipermail/python-dev/2017-November/150985.html below:

[Python-Dev] What's the status of PEP 505: None-aware operators?