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 :-)
-- Rhodri James *-* Kynesim Ltd _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
