On 23 April 2013 21:00, Terry Jan Reedy <[email protected]> wrote:
>
> That said, I do see that tuple/list.index have had start, stop paramaters
> added, so doing the same for .count is conceivable.
Are those new? I don't remember them not being there.
You need the start/stop parameters to be able to use index for finding
all occurrences of an item rather than just the first:
def indices(value, sequence):
i = -1
while True:
try:
i = sequence.index(value, i + 1)
except ValueError:
return
yield i
I thought this was a common use case for .index() and that if the
interface had been designed more recently then it might have just been
an .indices() method that returned an iterator.
Oscar
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