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

Jeff McAninch wrote:
> Should be legal, right?, since syntax would be>   <expression> except <expression> if <exception>> > Dino Viehland wrote:>> On option 1 is this legal then?>>>> x = float(string) except float('nan') if some_check() else >> float('inf') if ValueError>>>>   > Thinking more about the syntax options: if P.J.'s "if" Option is used, > it should also be optional.> That is, I would want this to also be legal,>  <expression> except <expression>> to trap any exception when robustness is more important than catching a > specific exception.

Catch all exceptions:

     <expression> except <expression>

Catch specific exceptions, optionally catching all others:

     <expression> except (<expression> if <exception>)+ [else <expression>]

Of course, a catch-all is a bare except, with all its dangers!

> > What would be the typical next step in trying to put this forward?  A > draft PEP?>