class Replacement: def replaceSpace(self, iniString, length): # write code here url = "" for s in iniString[:length]: if s == " ": url += "%20" else: url += s return url """ 以下代码不用写,直接提交,测试用例就会全部通过 while True: try: # a= input().split(',') a = input().split(',') b= a[0] c= int(a[1]) print(Replacement().replaceSpace(b,c)) except: break """