[Python-ideas] Delayed Execution via Keyword

[David Mertz]

On Sun, Feb 19, 2017 at 10:13 AM, Joseph Hackman <josephhackman at gmail.com>
wrote:
>
> My honest preference would be that the [] is evaluated fresh each time the
> function is called.
> def stuff(arg=delayed f()):
> would result in f() being called every time stuff() is. This seems more
> valuable to me than just doing it once when the function is first called.
>

This doesn't make sense.  Function definition time is very different than
function execution time.  Changing that distinction is a WAY bigger change
than I think we should contemplate.

Moreover, there is a completely obvious way to spell the behavior you want:

def stuff():

    arg = f()

    # ... whatever ...


This is exactly the obvious way to spell "f() is called every time stuff()
is".


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