Most Pythonic Way to Split an Array by Repeating Elements

Question

I have a list of items that I want to split based on a delimiter. I want all delimiters to be removed and the list to be split when a delimiter occurs twice. F

Answer 1

import re    
map(list, re.sub('(?<=[a-z])X(?=[a-z])', '', ''.join(lst)).split('XX'))

This does a list -> string -> list conversion and assumes that the non-delimiter characters are all lower case letters.