Get data out of connl-file

[ichabod801]

I think your index error on the deque is because your while loop upping/lowering the index. If the last item in that direction matches the while condition, the index will get too large/small for the deque, and give you an error. Like:

breakfast = ['spam', 'spam', 'spam', 'eggs']
index = 0
while True:
    print(breakfast[index])
    index += 1

The other problem I think has to do with the keys to your default dict being the third item, which is not unique. Each key can only hold one value. I think you want to append rather than updating:

factors = defautdict(list)
for num, factor in [(2, 1), (2, 2), (3, 1), (3, 3), (4, 1), (4, 2), (4, 4)]:
    factors[num].append(factor)