Split by k value remove duplicates without changing the order

Problem to split the string by k length and remove the duplicates letters.

Example-1:

Input    : n = "AABCAAADA"  k = 3
Output   : ['AB', 'CA', 'AD']
Explain  : step 1: split the string by k length, AAB CAA ADA
           step 2: Remove duplicates letters AB CA AD

Example-2:

Input    : n = "AABBCDDE"  k = 2
Output   : ['A', 'B', 'CD', 'DE']
Explain  : step 1: split the string by k length, AA BB CD DE
           step 2: Remove duplicates letters A B CD DE

Solution

from collections import OrderedDict

import textwrap

n = "AABCAAADA"

k = 3

l = []

c = textwrap.fill(n,k)

e = str(c)

d = e.split("\n")

for i in range(len(d)):

    l.append("".join(OrderedDict.fromkeys(d[i])))

print(l)

Output

['AB', 'CA', 'AD']