python - Replacing end few characters of list items? -

python - Replacing end few characters of list items? -

i'm trying replace lastly few characters of list items unsure how best so..

if illustration list is:

['44 illustration 1/1', '4 illustration here 444/13903', '1 ex exam ple 333/33x']

i want alter x on 3rd one, x shown below:

['44 illustration 1/1', '4 illustration here 444/13903', '1 ex exam ple 333/33x']

another illustration be:

['44 illustration 1/1a', '4 illustration here 444/13903de', '1 ex exam ple 333/33']

changing de de:

['44 illustration 1/1a', '4 illustration here 444/13903de', '1 ex exam ple 333/33']

another illustration be:

['44 illustration 1/1', '4 illustration here 444/13903', '1 ex exam ple 199/1']

changing 199/1 1/1:

['44 illustration 1/1', '4 illustration here 444/13903', '1 ex exam ple 1/1']

i've tried utilize simple .replace(x, y) goes wrong lot middle parts , start.

i have regex created still unsure how it... (\s+) (.*?) (\s+)$

any help appreciated.

use $ match end of string

import re re.sub('de$', 'de', '4 illustration here 444/13903de')

python regex string python-2.7 replace