python - 按顺序打印字符串

Question

目标是从用户那里读取一个字符串，并在不使用列表或 sort() 的情况下将该字符串按 ASCII 代码的顺序排列下面是我的代码

answer = input("enter string: ")
len_ans = len(answer)
new_answer = ""
previous = " "
leftover =""

while True:
    for i in range(len_ans):

        if (ord(previous[0])) >= (ord(answer[i])):
            new_answer += previous
        else:
            leftover += previous
        print(new_answer)

        previous = answer[i]

    new_answer += leftover
    leftover = ""

    answer = new_answer

    if answer == new_answer:
        print(new_answer)
        break
    else: 
        new_answer = ""

Answer 1

使用sorted函数:

>>> s = 'Hello, world!'

>>> sorted(s)
=> [' ', '!', ',', 'H', 'd', 'e', 'l', 'l', 'l', 'o', 'o', 'r', 'w']   

>>> ''.join(sorted(s))
=> ' !,Hdellloorw'