How to add islice function to python program?

Question

I am trying to use the islice function but am getting the following error:

Traceback (most recent call last):
  File "/Users/gavinnachbar/Session 3 copy/all_in_one_almost.py", line 168, in <module>
    all_decisions.extend(islice(reader,4))
NameError: name 'islice' is not defined

I have imported itertools but am still getting the error, any idea why?

Answer 1

... because you are trying to import iterator, which does not exist?

Edit:

Have you tried either

from itertools import islice

or

all_decisions.extend(itertools.islice(reader,4))

Answer 2

Q. I have imported itertools but am still getting the error, any idea why?

A. Yes. When you import itertools, you need to write itertools.islice instead of just islice.