("<Return>", self.clear_entry) 71 #创建一个登录按钮 72 self.utk_b_login = Button(root,text="打印",font=("Arial",12),width=10,height=1) 73 self.utk_b_login.place(x = 150,y = 210) 74 self.utk_b_login["command"] = self.songhua 75 #创建一个提示信息标签 76 self.utk_l_...