python 析構函數：__del__()

'''
析構函數：__del__()    釋放對象是自動調用
'''

class Person(object):
    def run(self):
        print("run")
    def eat(self, food):
        print("eat " + food)
    def __init__(self, name, age, height, weight):
        self.name = name
        self.age = age
        self.height = height
        self.weight = weight
    def __del__(self):
        print("這里是析構函數")

per = Person("hanmeimei", 20, 170, 55)
#釋放對象
del per

#對象釋放以后就不能再訪問了
#print(per.age)

#在函數里定義的對象，會在函數結束時自動釋放，這樣可以用來減少內存空間的浪費
def func():
    per2 = Person("aa", 1, 1, 1)

func()

while 1:
    pass