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。

  • 使用replace方法
class Solution:
    def replaceSpace(self , s ):
        # write code here
        return s.replace(" ","%20")
str01 = "We Are Happy"
s = Solution()
print(s.replaceSpace(str01))
  • 使用re.sub方法
class Solution:
    def replaceSpace(self , s ):
        return re.sub(' ','%20',s)
str01 = "We Are Happy"
s = Solution()
print(s.replaceSpace(str01))