字符串反转

code

#利用reverse方法
l = list(s) 
l.reverse() 
result = "".join(l)

#利用reversed()方法
def str_num(num):
    print num[::-1]
    print "".join(reversed(num))
    print reversed(num),type(reversed(num))
str_num(num)

#递归思想

num = 'chejibadan'
def diGui(num):
    if len(num)<=1:
        return num 
    return diGui(num[1:])+num[0]
result = diGui(num)
print result

#利用循环思想
def ce(num):

　　new_str=[] 
　　index = len(num) 
　　while index: 
　　　　index = -1 
　　　　new_str.append(num[index]) 
　　　　return ''.join(new_str)

参考链接

https://www.cnblogs.com/taceywong/p/8045127.html