catching exceptions from an except: block

[Gabriel Genellina]

En Wed, 07 Mar 2007 18:48:18 -0300, Arnaud Delobelle  
<arnodel at googlemail.com> escribió:

> for f in int, float, complex:
>     try:
>         return f(x)
>     except ValueError:
>         continue
> raise CantDoIt
>
> But if the three things I want to do are not callable objects but
> chunks of code this method is awkward because you have to create
> functions simply in order to be able to loop over them (this is whay I
> was talking about 'abusing loop constructs').  Besides I am not happy
> with the other two idioms I can think of.

Hmmm, functions are cheap - nobody is charging you $2 for each "def"  
statement you write, I presume :)

A bit more serious, if those "chunks of code" are processing its input and  
returning something that you further process... they *are* functions. If  
you don't want them to be publicly available, use inner functions:

def xxxfactory(x):
   def f1(x):
      ...
   def f2(x):
      ...
   def f3(x):
      ...

   for f in f1,f2,f3:
     try:
       return f(x)
   ... same as above...

-- 
Gabriel Genellina