python中如何统计一个类的实例化对象

类中的静态变量 需要通过类名.静态变量名 来修改 ;通过对象不能修改

python中如何统计一个类的实例化对象??

 1 class Person:
 2       #静态变量count,用于记录类被实例化的次数
 3      count = 0
 4       
 5       mind = "有思想"
 6       animal = "高级动物"
 7       soul = "有思想"
 8       def __init__(self ,country ,name ,sex ,age ,height ):
 9             self.country = country
10             self.name = name
11             self.sex = sex
12             self.age = age
13             self.height = height
14             #类被实例化时,会自动调用__init__()方法
15             #类中的静态变量 需要类名.静态变量来修改
16             Person.count += 1
17             
18       def eat(self):
19             print("%s在吃饭" %self.name)
20       def sleep(self):
21             print("%s睡觉" %self.name)
22       def  work(self):
23             print("%s工作……" %self.name)
24 
25 p1 = Person("中国","张三","","42","175")
26 p2 = Person("中国","李四","","35","180")
27 p3 = Person("美国","tanx","","21","160")
28 p4 = Person(p1.country,p2.name,p3.sex,p2.age,p3.height)
29 
30 #通过类名   可以改变类中的静态变量
31 print(Person.count)
32 
33 #通过对象 不能改变类中的静态变量的值 
34 p1.count = 8
35 print(Person.__dict__)
统计类的实例化对象代码

运行结果为:

4
{'__module__': '__main__', 'count': 4, 'mind': '有思想', 'animal': '高级动物', 'soul': '有思想', 
'__init__': <function Person.__init__ at 0x00000000003C1E18>, 'eat': <function Person.eat at 0x000000000317AE18>, 
'sleep': <function Person.sleep at 0x000000000317AEA0>, 'work': <function Person.work at 0x000000000317AF28>, 
'__dict__': <attribute '__dict__' of 'Person' objects>, '__weakref__': <attribute '__weakref__' of 'Person' objects>, '__doc__': None}

  

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转载自www.cnblogs.com/tanxu05/p/9885108.html