Roy Smith <[EMAIL PROTECTED]> wrote:
...
> TypeError: iteration over non-sequence
>
> I was kind of hoping for a more specific exception than TypeError.
> You can't tell the difference between:
>
> try:
> for i in 5:
> print i + 1
> except TypeError:
> print "non-iterable"
>
> and
>
> try:
> for i in ["one", "two", "three"]:
> print i + 1
> except TypeError:
> print "can't add string and integer"
>
> Unfortunately, you can't just try it in a bodyless loop to prove that
> you can iterate before doing the real thing because not all iterators
> are idempotent.
It's not hard...:
try:
_it = iter(whatever)
except TypeError:
print 'non-iterable'
else:
for i in _it: # etc, etc
Alex
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