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

Regex, I choose you!

import re

def split_multiple(delimiter, input):
    pattern = ''.join(map(lambda x: ',' if x == delimiter else ' ', input))
    filtered = filter(lambda x: x != delimiter, input)
    result = []
    for k in map(len, re.split(';', ''.join(re.split(',',
        ';'.join(re.split(',{2,}', pattern)))))):
        result.append([])
        for n in range(k):
            result[-1].append(filtered.__next__())
    return result

print(split_multiple('X',
    ['a', 'b', 'X', 'X', 'c', 'd', 'X', 'X', 'f', 'X', 'g']))

Oh, you said Python, not Perl.