[Python-ideas] except expression

[Steven D'Aprano]

On Sun, Feb 16, 2014 at 07:31:17PM -0800, Ethan Furman wrote:
> I see two motivating factors for an except expression:
> 
>   - one line try/except handling for simple cases
>   - easier default value handling when function/method does not support a 
>   default value
> 
> Given that, I don't think we need to support multiple exception types or 
> chained exceptions.  If it's that complicated, use an actual try block -- 
> it'll be much more readable.

I'm sympathetic to this view, but I think that by using appropriate 
parentheses, multiple exception types and multiple exceptions are very 
readable.

Of course, like deeply nested list comps or generator expressions, or 
too many ternary-if expressions, you can obfuscate your code by abusing 
this proposed syntax. The answer to that is, Don't Do That.



-- 
Steven