字符串转换

字符串转换，如：IloveYOUmoreTHANiCANsay => I love you more than i can say

def sep_words(s):
    #第一个字母转换为大写
    ret = s[0].upper()
    # print(ret)
    for i in range(1,len(s)):
        # print(i)
        # 查看前后两个字符是否分别为大小写
        if s[i].islower() == s[i-1].isupper():
            # 中间拼接空格
            ret += ' '
            # print(ret)
        ret += s[i].lower()
    return ret
print(sep_words('IloveYOUmoreTHANiCANsay'))