class study

class Person:
    def __init__(self,name,age):
        self.name = name
        self.age = age

    def __del__(self):
        print("person is reclaimed.")

    def wakeup(self,at):
        print("{0} wake up at {1} am".format(self.name,at))

mars = Person("xuefeifei", 30)
print(mars.name)
print(mars.age)
mars.wakeup(7)