[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')
If accepted, this would also solve the feature requests for various functions
to have default arguments.
For example:
x = min(seq) except ValueError else 0 # default to zero for empty
sequences
It would also be helpful in calculations that have algebraic restrictions:
sample_std_deviation = sqrt(sum(x - mu for x in seq) / (len(seq)-1)) except
ZeroDivisionError else float('Inf')
Raymond
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