Need help with itertools.islice()

[Charles1]

Hi,

I recently came across this function but can't make sense of the arguments.
The documentation gives the declaration as below and examples.
https://docs.python.org/2/library/iterto...ols.islice

1 2 3

itertools.islice(iterable, start, stop[, step]) # islice('ABCDEFG', 2) --> A B # islice('ABCDEFG', 2, 4) --> C D

Example 1 shows that A B are printed but but the argument '2' is the starting index
so shouldn't the output be CDEFG?

Thanks in advance for any help.

[stranac]

There are two ways to call islice, as shown in the docs:

itertools.islice(iterable, stop)
itertools.islice(iterable, start, stop[, step])

As you can see, in the two-argument form, the second argument is the stopping index, not the starting one.

[Charles1]

Thanks.
Missed the two argument declaration.