类方法、绑定的类、静态方法

BrightXiong

# !/usr/bin/python3
# -*- coding: utf-8 -*-
# @Time   : 2023/2/23 20:41
# @Author : xiongming
# @File   : lei_Func.py
# @Desc   : 类方法、绑定的类、静态方法

class A:
    def funA(self):
        print(self)
    @classmethod
    def funB(cls):
        print(cls)

a = A()
# 绑定的对象 object  <__main__.A object at 0x7fb4e005eeb0>
print(a.funA())
# 类 <class '__main__.A'>
print(a.funB())

class C:
    count = 0
    def __init__(self):
        C.count += 1
    @classmethod
    def get_count(cls):
        print(f"该类一共实例化了{cls.count} 个对象")

c1 = C()
c2 = C()
c3 = C()
c3.get_count()
c3.count = 1
print(c3.count)
print(c3.get_count())

# 静态方法 不需要绑定
class B:
    @staticmethod
    def funC():
        print("I love FishC")

b = B()
b.funC()
B.funC()

# 涉及继承问题
class E:
    count = 0
    @classmethod
    def add(cls):
        cls.count +=1
    def __init__(self):
        self.add()
    @classmethod
    def get_count(cls):
        print(f"该类一共实例化了{cls.count} 个对象")

class W(E):
    count = 0

class F(E):
    count = 0

e1 = E()
w1, w2 = W(), W()
f1, f2, f3 = F(), F(), F()
e1.get_count()
w1.get_count()
f1.get_count()