Tim Chase wrote:
> On 2016-03-16 16:53, Peter Otten wrote:
>> > item=None
>> > for item in items:
>> > #do stuff
>> if item is None:
>> > #do something else
>>
>> I like that better now I see it.
>
> The only problem with that is if your iterable returns None as the
> last item:
I was aware of that. In practice I'd ensure the stronger "sentinel must not
occur in the iterable":
> items = ["Something here", None]
> item = None
> for item in items:
assert item is not None
> print(repr(item))
> if item is None:
> print("Empty iterable") # wait, no it's not!
>
> You'd have to use a sentinel like Ruud mentions further up-list:
>
> x = sentinal = object()
> for x in sequence:
> print(repr(x))
> if x is sentinal:
> print("Empty iterable")
>
> -tkc
--
https://mail.python.org/mailman/listinfo/python-list
