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？？

class Person:
      #静态变量count，用于记录类被实例化的次数
     count = 0
      
      mind = "有思想"
      animal = "高级动物"
      soul = "有思想"
      def __init__(self ,country ,name ,sex ,age ,height ):
            self.country = country
            self.name = name
            self.sex = sex
            self.age = age
            self.height = height
            #类被实例化时，会自动调用__init__()方法
            #类中的静态变量 需要类名.静态变量来修改
            Person.count += 1
            
      def eat(self):
            print("%s在吃饭" %self.name)
      def sleep(self):
            print("%s睡觉" %self.name)
      def  work(self):
            print("%s工作……" %self.name)

p1 = Person("中国","张三","男","42","175")
p2 = Person("中国","李四","男","35","180")
p3 = Person("美国","tanx","女","21","160")
p4 = Person(p1.country,p2.name,p3.sex,p2.age,p3.height)

#通过类名   可以改变类中的静态变量
print(Person.count)

#通过对象 不能改变类中的静态变量的值 
p1.count = 8
print(Person.__dict__)

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}