[Tutor] try except block for multiple statements

[bob gailer]

Bryan Fodness wrote:
> I would like to use a try except to see if a value exists.  But, when 
> I use the following, if a does not exist it exits.  I understand why 
> this does this, but is there a way to get b,c, and d if a does not 
> exist without using a try except for every statement?
>  
> try:
>     fo.write("a = %s\n" %plan.a)
>     fo.write("b = %s\n" %plan.b)
>     fo.write("c = %s\n" %plan.c)
>     fo.write("d = %s\n" %plan.d)
> except AttributeError:
>     pass
>
def foo(obj, attr):
  val = getattr(obj, attr, None)
  if val is not None:
    obj.write("%s = %s\n" % (attr, val))
foo(plan, "a")
foo(plan, "b")
foo(plan, "c")
foo(plan, "d")


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> "Any intelligent fool can make things bigger, more complex, and more 
> violent. It takes a touch of genius - and a lot of courage - to move 
> in the opposite direction. "  -Albert Einstein
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-- 
Bob Gailer
Chapel Hill NC 
919-636-4239