数组字符常用操作

字符串反转

def reverseString(s):
    begin = 0
    end = len(s)-1
    ss = list(s)
    while(end>begin):
        ss[begin], ss[end] = ss[end], ss[begin]
        end -= 1
        begin += 1
    return ''.join(ss)

来源：https://www.cnblogs.com/JetBlock/p/11969821.html