On 10/26/21 12:08 PM, Ricky Teachey wrote:
> On Tue, Oct 26, 2021 at 2:40 PM Chris Angelico wrote:
>> Do you have any examples where this isn't the case?
>
> I don't. I only have a niggling feeling that maybe this is a bigger problem
than
> we're giving it credit for.
>
> At bottom I guess I'd describe the problem this way: with most APIs, there is
a way
> to PASS SOMETHING that says "give me the default". With this proposed API, we
don't
> have that; the only want to say "give me the default" is to NOT pass
something.
>
> I don't KNOW if that's a problem, it just feels like one.
Several times I've had to write code that calls a function in several different ways, based solely on where I could pass
None to get the default behavior:
my_wrapper_func(this, that, the_other=None):
if framework.version > 4:
framework.utility(this, that, the_other)
elif framework.version > 3.5:
if the_other is None:
framework.utility(this, that)
else:
framework.utility(this, that, the_other)
What a pain.
When this PEP originally came out I thought that passing None was the way to trigger it -- if that's not the case, and
there is nothing we can pass to trigger it, I am much less interested.
--
~Ethan~
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