有人可以帮我这个程序吗？

Question

   class student:def __init__(self,name,sub,mark):    self.name=name    self.sub=sub    self.mark=markdef on_kv_board(self):    if (self.mark>=450):        return True    else:`enter code here`        return Falsestudents=[]num_student=int(input("Enter the number of students appeared:"))for entries in range(0,num_student):name=input("Student name:")sub=input("Subject in which "+name+" got the highest mark:")mark=int(input("Total marks obtained/500:"))if student(name,sub,mark).on_kv_board() is True:    a=(student(name,sub,mark))    students.append(a)print(students)每当我用两个输入来打印students []列表时，它就会给我一个输出[0x03784790的Student.student对象，0x037D61B0的Student.student对象]