python面试的100题（6）

print("aStr"[::-1])

result = s[::-1]

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)