26 Apr
2018
26 Apr
'18
12:20 p.m.
On Thu, Apr 26, 2018 at 8:56 AM, Steven D'Aprano steve@pearwood.info wrote:
On Thu, Apr 26, 2018 at 03:31:13AM -0400, Terry Reedy wrote:
On 4/25/2018 8:20 PM, Chris Angelico wrote:
On Thu, Apr 26, 2018 at 10:11 AM, Yury Selivanov
yselivanov.ml@gmail.com wrote:
Just yesterday this snippet was used on python-dev to show how great the new syntax is:
my_func(arg, buffer=(buf := [None]*get_size()),
size=len(buf))
What strikes me as awful about this example is that len(buf) is get_size(), so the wrong value is being named and saved. 'size=len(buf)' is, in a sense, backwards.
Terry is absolutely right, and I'm to blame for that atrocity. Mea culpa.
Perhaps a better spelling would be
my_func(arg, buffer=[None]*(buflen := get_size()), size=buflen)
[...]