On Thu, Jul 19, 2018 at 5:29 PM Steve Dower <steve.do...@python.org> wrote:
> * "It makes it more complex"
> * "It's harder to follow the flow"
>
> Depends on your measure of complexity. For me, I prioritise "area under
> the indentation" as my preferred complexity metric (more lines*indents
> == more complex), as well as left-to-right reading of each line (more
> random access == more complex). By these measures, ?. significantly
> reduces the complexity over any of the current or future alternatives::
>
> def f(a=None):
> name = 'default'
> if a is not None:
> user = a.get_user()
> if user is not None:
> name = user.name
> print(name)
>
You left one out, I think, that looks decent. I converted the print to a
return, because I think it's more common to return than print.
def f(a=None):
try:
return a.get_user().name
except AttributeError:
return 'default'
def f(a=None):
> print(a?.get_user()?.name ?? 'none')
>
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