[Python-Dev] Should issubclass() be more like isinstance()? (original) (raw)

James Y Knight foom at fuhm.net
Wed Apr 5 06:59:41 CEST 2006

On Apr 4, 2006, at 11:41 PM, Alex Martelli wrote:

IMHO, the solution to THAT very real problem is to supply a built-in function that catches some exceptions and maps them into suitable return values. Simplest would be something like: [...] though I'm sure we can get better syntax if we turn 'catch' into some kind of syntactic special form. My point is that there are umpteen predicates one can write which would have to be distorted to ensure they can't raise -- better to let them raise if they must, and allow catching the expected exception(s), somewhat like this example.

And while you're at it, how about some syntax to use try/finally and
while inside expressions too.

That will complete the duplication of flow control syntax between
statement and expression form.

James

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