Most efficient way of splitting strings like rubik's cube notations in python?

Question

If a string like "RL2R'F2LD'" given,What is the most efficient way of splitting this into Strings "R" "L2" "R'" "F2" "L" "D'"? I'v tried few methods like first splitting them into individual chars and then trying to add them to a list and nothing worked correctly.

Answer 1

def rubikstring(s):
    import string
    cumu = ''
    for c in s:
        if c in string.ascii_letters:
            if cumu: yield cumu
            cumu = ''
        cumu += c
    if cumu: yield cumu

could do your job. With

>>> for i in rubikstring("RL2R'F2LD'"): i
...
'R'
'L2'
"R'"
'F2'
'L'
"D'"

you get your desired result, with

>>> list(rubikstring("RL2R'F2LD'"))
['R', 'L2', "R'", 'F2', 'L', "D'"]

as well.