In article <[EMAIL PROTECTED]>,
py <[EMAIL PROTECTED]> wrote:
>I have function which takes an argument. My code needs that argument
>to be an iterable (something i can loop over)...so I dont care if its a
>list, tuple, etc.
My first thought was to just write your loop inside a try block and
catch the error if it wasn't iterable, but then I noticed that you get:
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 an interesting problem.
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