请实现一个函数,将一个字符串中的空格替换成“%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。
class Solution:
# s 源字符串
def replaceSpace(self, s):
# write code here
#return s.replace(' ','%20')
s = list(s)
a = len(s)
for i in range(a):
if s[i]==' ':
s[i]='%20'
return ''.join(s)