属性查找

xxx=33333
class OldboyStudent:
    school = 'oldboy'
    # xxx=2222
    yyy=333
    count=0

    def __init__(obj, name, age, sex):
        # print(OldboyStudent.yyy)
        # print(obj.yyy)

        OldboyStudent.count+=1
        obj.name = name #stu1.name='李铁蛋'
        obj.age = age   #stu1.age=18
        obj.sex = sex   #stu1.sex='male'

    def choose_course(self):
        print('choosing course')

# 1. 属性查找顺序
# stu1=OldboyStudent('李铁蛋',18,'male')
# print(stu1.__dict__)
# print(OldboyStudent.__dict__)
# stu1.xxx=111
# print(stu1.__dict__)
# 先从对象自己的名称空间找,没有则去所属的类中找
# print(stu1.xxx)

# 2.
stu1=OldboyStudent('李铁蛋',18,'male')
stu2=OldboyStudent('赵钢弹',38,'female')
stu3=OldboyStudent('刘银弹',28,'male')
# print(stu1.count)
# print(stu2.count)
# print(stu3.count)
# print(OldboyStudent.count)

# 类中定义的变量是所有对象共享的,对象可以来用,类也可以来使用,类一旦改变自己的数据属性的值,所有的对象都能感知到
# print(id(stu1.school))
# print(id(stu2.school))
# print(id(stu3.school))
# print(id(OldboyStudent.school))

# stu1.school=123
# # OldboyStudent.school='OLDBOY'
# print(stu1.__dict__)
# print(stu2.__dict__)
# print(stu3.__dict__)
# print(OldboyStudent.__dict__)
#
# print(OldboyStudent.school)
# print(stu1.school)
# print(stu2.school)
# print(stu3.school)








# print(id(stu1.choose_course))
# print(id(stu2.choose_course))
# print(id(stu3.choose_course))

# class OldBoy:
#     yyy = 222  # 在类中 想要改全部的值必须在类的独有的名称空间去改
#
#     def __init__(self, name, password, age):
#         yyy = 111  # 如果在这里写 只会改类所在的属性下面的值，与其他的类无关
#         print(self.yyy)
#         self.name = name
#         self.password = password
#         self.age = age
#
#     def couser(self):
#         print(">>>>")
#7787p
#
# stu1 = OldBoy("zhouxiang", 123, 18)

class OldboyStudent:
    school='oldboy'
    count=0

    def __init__(self, x, y, z): #会在调用类时自动触发
        self.name = x #stu1.name='耗哥'
        self.age = y  #stu1.age=18
        self.sex = z #stu1.sex='male'
        OldboyStudent.count+=1

    def choose_course(self):
        print('is choosing course')


# 先从对象自己的名称空间找，没有则去类中找，如果类也没有则报错
stu1=OldboyStudent('耗哥',18,'male')
stu2=OldboyStudent('猪哥',17,'male')
stu3=OldboyStudent('帅翔',19,'female')

print(OldboyStudent.count)
print(stu1.count)
print(stu2.count)
print(stu3.count)