面向对象的类和实例的增删改查

class School:
   
    country = "china"
　　 def __init__(self,name):
    　　self.name = name
    def have_lesson(self):
        print("%s的班级正在上课"%self)
p1 = School("李老师")

'''类数据属性的增删改查
查
print(School.country)
>>> china

改
School.Teacher="老李"
print(School.Teacher)
增
School.foo ="小孙"
print(School.__dict__)
删
del School.foo
print(School.__dict__)
'''
#类函数属性的增删改查同实例属性
def eat_food(self,food):
    print("正在吃")
School.eat = eat_food
print(School.__dict__)
School.eat