替换空格

Posted 2021-02-14 welan

问题描述

请实现一个函数，将一个字符串中的每个空格替换成“%20”。例如，当字符串为We Are Happy.则经过替换之后的字符串为We%20Are%20Happy。

代码

# -*- coding:utf-8 -*-
class Solution:
    # s 源字符串
    def replaceSpace(self, s):
        # write code here
        str = []
        num = s.count(' ')
        for char in s:
            if char == ' ' and num > 0:
                char = '%20'
                num -= 1
            str.append(char)

        newstr = ''.join(str)
        return newstr