class cre: xudu=50 def run(self): print("正在跑") def zairei(self): print("载重6人") class yuhuoche(cre): def zhuangzai(self): print("装载10吨") class chuzuche(cre): def init(self,ren): self.run=ren def yuxong(self): print("送",self.run) c=chuzuche("qiusiyi") c.yuxong()