July 19, 2018
5:32 p.m.
On Thu, Jul 19, 2018, 08:47 Rhodri James <rhodri@kynesim.co.uk> wrote:
On 19/07/18 09:33, Antoine Pitrou wrote:
There is a use case I sympathize with: the argument-is-None case. For that I would suggest a simpler form: "A else B" which would evaluate to A if A is not None, otherwise to B (parentheses may be mandatory).
So e.g. one of the examples would read:
def insort_right(a, x, lo=0, hi=None): # ... hi = hi else len(a) # ...
Much as I would like a keyword, "else" is the wrong one. It implies we are dealing with truthiness, which we aren't, and lays a subtle semantic trap as a consequence.
If anyone can think of a good word for "if it isn't None, otherwise", I'd be all for it :-)
What about "nelse"?