split_chars_riddle.py

# Why does this work
def split_chars(words, chars):
    itr = (words,)
    for c in chars:
        itr = tuple(chunk for word in itr for chunk in word.split(c))
    return list(itr)

# but this not work
def split_chars_broken(words, chars):
    itr = (words,)
    for c in chars:
        itr = (chunk for word in itr for chunk in word.split(c))
    return list(itr)

>>> split_chars("assdf,asdfadsf.sadfadsf,asdf.asdf", ".,")
['assdf', 'asdfadsf', 'sadfadsf', 'asdf', 'asdf']

>>> split_chars_broken("assdf,asdfadsf.sadfadsf,asdf.asdf", ",.")
['assdf,asdfadsf', 'sadfadsf,asdf', 'asdf']

>>> split_chars_broken("assdf,asdfadsf.sadfadsf,asdf.asdf", ".,")
['assdf', 'asdfadsf.sadfadsf', 'asdf.asdf']