[Python-ideas] ternary without else
Jacco van Dorp
j.van.dorp at deonet.nl
Fri May 25 08:39:33 EDT 2018
2018-05-25 14:26 GMT+02:00 Kirill Balunov <kirillbalunov at gmail.com>:
> If it is an expression, what should `do_something if cond` return on
> failure? If you don't care you can already use `cond and do_something`.
Duh, forgot to mention.
I wouldn't have it return anything. Ternary returns something because
you have two options and picks one. This is conditional execution of a
statement. I guess it would be a statement, like normal if.
I guess cond and do_something would be equivalent, but that's not
really the intention of and/or, no matter how much it's used for this
sort of thing.
I don't really expect this to be accepted. It's more of a minor gripe
i've occasionally had. This afternoon, I wrote:
if not article["art_wt"]: article["art_wt"] = 0
if not article["px_pchs"]: article["px_pchs"] = 0
if not article["px_calc"]: article["px_calc"] = 0
if not article["px_sell"]: article["px_sell"] = 0
while preparing a dict for import in accountview. I try not to make a
habit of dismissing syntax warnings. I consider the code above
abundantly clear (no, I dont know what those keys mean. Since I have
no power over that, I dont consider it detrimental to clarity.)
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