Python3实现：字符串反转
#方式一(切片)
astr = 'abcdef' bstr = astr[::-1]
print(bstr)
#方式二 def myreverse
(s):
l = list(s)
l.reverse()
print("".join(l))
myreverse('abcdef')
#方式三（递归） def myreverse1
(s):
if s == "":
return s
else:
return myreverse1(s[1:]) + s[0]
print(myreverse1('abcdef'))
#方式四(逐个字符处理) def myreverse2
(s):
t = '' r = len(s) - 1 while r >= 0:
t = t + s[r]
r -= 1 return t
print(myreverse2('abcdef'))
#方式五（使用sorted（）方法） def myreverse3(s): l = list(s) newl = sorted(l,key = None,reverse = True) news = ''.join(newl) return news print(myreverse3('abcdef'))