[Python-ideas] a in x or in y

[Greg Ewing]

Boris Borcic wrote:
> Are you trying to say "X in Y and" forms a complete expression?

No, I think he's saying that "X in Y" forms a complete
expression, but only if it's *not* followed by "or in".
If it is, you need to back up and re-interpret it as
"X in <something more complicated>".

A syntax along the lines of

    X in either Y or Z

would avoid the problem. But we don't have a good
candidate for 'either' that's already a keyword.

-- 
Greg