Python如何反转字符串

>>> s="abcdef"

>>> result = s[::-1]

>>> print(result)

fedcba

l = list(s)

l.reverse()

result = "".join(l)

l = list(s)

result = "".join(l[::-1])

result = reduce(lambda x,y:y+x,s)

def func(s):

    if len(s) <1:

        return s

    return func(s[1:])+s[0]

result = func(s)

def func(s):

    l = list(s) #模拟全部入栈

    result = ""

    while len(l)>0:

        result += l.pop() #模拟出栈

    return result

result = func(s)

def func(s):

    result = ""

    max_index = len(s)-1

    for index,value in enumerate(s):

        result += s[max_index-index]

    return result

result = func(s)