914. 翻转游戏

class Solution:
    """
    @param s: the given string
    @return: all the possible states of the string after one valid move
    """
    ‘‘‘
    大致思路:
    1.初始化res = []
    2.依次循环切割两位，如果== ‘++‘的话，那么就进行转换,然后append到res里面，直到循环到最后返回res即可
    ‘‘‘
    def generatePossibleNextMoves(self,s):
        res = []
        for i in range(len(s)-1):
            if s[i:i+2] == ‘++‘:
                res.append(s[:i] + ‘--‘ + s[i+2:])
        return res