python實現字符串反轉的6種方法

1.切片

s='abc'
print(s[::-1])

2.列表中的reverse

s='abc'
l=list(s)
l.reverse()
resault="".join(l)

3.reduce方法

from functools import reduce
s='abc'
resault=reduce(lambda x,y:y+x,s)
print (resault)

4.遞歸函數

s='abc'
def func(s):
    if len(s)<1:
        return s
    return func(s[1:])+s[0]
resault=func(s)
print (resault)

5.使用棧

s='1234'
def func(s):
    l=list(s)#模擬全部入棧
    resault=''
    while len(l)>0:
        resault+=l.pop()#模擬出棧
    return resault
resault=func(s)
print (resault)

6.for循環

s='4567'
def func(s):
    resault=''
    max_index=len(s)-1
    for index,value in enumerate(s):
        resault+=s[max_index-index]
    return resault
resault=func(s)
print (resault)