类与对象

一、类属性增删改查

class People:
    country = 'china'
    def __init__(self,name,action):
        self.name = name
        self.action = action

    def eat_food(self,food):
        print('%s 正在吃 %s'%(self.name,food))
#查看类数据
print(People.country)#china
#增加类数据
p1 = People('zhuo','action')
People.age = 14
print(People.__dict__) #字典形式查看类数据，包括方法，属性
print(p1.age) #14
#删类数据
del People.age
print(People.__dict__)
#改类数据
People.country = 'chin'
print(People.country) #chin

#增加类中方法
def run(self):
    print('running')
People.run = run
print(People.__dict__)
p1.run() #running

#修改类中方法
People.eat_food = run
p1.eat_food() #running