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[Python-Dev] (try-except) conditional expression similar to (if-else) conditional (PEP 308)

From: P.J. Eby <p...@telecommunity.com>
Wed, 05 Aug 2009 21:20:54 -0400
At 05:59 PM 8/5/2009 -0700, Raymond Hettinger wrote:
>[Jeffrey E. McAninch, PhD]>>I very often want something like a try-except conditional expression similar>>to the if-else conditional.>>>>An example of the proposed syntax might be:>>    x = float(string) except float('nan')>>or possibly>>    x = float(string) except ValueError float('nan')>>+1 I've long wanted something like this.>One possible spelling is:>>   x = float(string) except ValueError else float('nan')

I think 'as' would be better than 'else', since 'else' has a 
different meaning in try/except statements, e.g.:

    x = float(string) except ValueError, TypeError as float('nan')

Of course, this is a different meaning of 'as', too, but it's not 
"as" contradictory, IMO...  ;-)

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Jeff McAninch Aug 05, 2009 10:22 pm
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