def find_indexes(lst, item):
    """Find the index of a character (or characters) in a list"""
    start_at = -1
    locs = []
    while True:
        try:
            loc = lst.index(item, start_at + 1)
        except ValueError:
            break
        else:
            locs.append(loc)
            start_at = loc
    return locs