6 kyu Unique In Order.py

"""
https://www.codewars.com/kata/54e6533c92449cc251001667/train/python


Implement the function unique_in_order which takes as argument a sequence and returns a list of items without any elements with the same value next to each other and preserving the original order of elements.

For example:

unique_in_order('AAAABBBCCDAABBB') == ['A', 'B', 'C', 'D', 'A', 'B']
unique_in_order('ABBCcAD')         == ['A', 'B', 'C', 'c', 'A', 'D']
unique_in_order([1,2,2,3,3])       == [1,2,3]
"""


def unique_in_order(iterable):
  lst = list(iterable)
  i = 0
  j = 1

  for _ in lst[:-1]:
      if lst[i] == lst[j]:
          lst.pop(j)
      else:
          i += 1
          j += 1
            
    return lst