方法一
对于str类型,python并没有reverse函数。然而,通过反向步进切片,我们可以高效地反转一串字符串。
s = 'abcde'
s[::-1]
方法二:
print ''.join(reversed('hello world'))
方法三
#字符串的反转
def reverse (s):
rt = ''
for i in range(len(s)-1, -1, -1):
rt += s[i]
return rt
def reverse2 (s):
li = list(s)
li.reverse()
rt = "".join(li)
return rt
from functools import reduce
def reverse5 (s):
return reduce(lambda x,y:y+x,s)