marduk wrote:
> On Tue, 2005-11-15 at 11:01 -0800, py 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. So I need a way to make sure that the argument is an
>>iterable before using it. I know I could do...
>>
>>def foo(inputVal):
>> if isinstance(inputVal, (list, tuple)):
>> for val in inputVal:
>> # do stuff
>>
>>...however I want to cover any iterable since i just need to loop over
>>it.
>>
>>any suggestions?
>
> You could probably get away with
>
> if hasattr(inputVal, '__getitem__')
No, you probably couldn't.
##################
>>> def g(s):
for i in xrange(s):
yield i+s
>>> m = g(5)
>>> hasattr(m, '__getitem__')
False
###################
I'd do something like:
#####################
def foo(inputVal):
try:
iter(inputVal) # Can you change it into an interator?
except TypeError:
# Return Error Code
else:
for val in inputVal:
# do stuff
#######################
Again, you'll have to be careful about strings.
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