面向对象 组合 (嵌套)

2.组合(嵌套)
面向对象:
创建三个学校且三个学校的设施内容等都是一致.
 

class School(object):
    def __init__(self, name, address):
        self.name = name
        self.address = address

    def speech(self):
        print('蜈蚣')


obj1 = School('蜀国校区', '美丽富饶天水')
obj2 = School('蜀国上庸校区', '上庸')
obj3 = School('魏国洛阳校区', '长安')


class Teacher(object):
    def __init__(self, name, age, salary):
        self.name = name
        self.age = age
        self.__salary = salary
        self.school = None


t1 = Teacher('张飞', 19, 188888)
t2 = Teacher('关羽', 18, 60)
t3 = Teacher('刘备', 16, 900000)
# ############## 老师分配校区
t1.school = obj1
t2.school = obj1
t3.school = obj2
# ####################################
# 查看t1老师,所在的校区名称/地址
print(t1.school.name)
print(t1.school.address)
print(t1.name)
print(t1.age)
t1.school.speech()

准则: 字段和方法的归类.

以前:

[
    {"name": 'alex1', 'age': 18, xxx: 999},
    {"name": 'alex2', age':18},
]

下面上练习题:

 

# ### 1. 类或对象是否能做字典的key

 

class Foo:
    pass

user_info = {
    Foo:1,
    Foo():5
}

print(user_info)

# ### 2. 对象中到底有什么?

 

class Foo(object):

    def __init__(self,age):
        self.age = age

    def display(self):
        print(self.age)

data_list = [Foo(8),Foo(9)]
for item in data_list:
    print(item.age,item.display())

# ### 3.

 

class StarkConfig(object):

    def __init__(self,num):
        self.num = num

    def changelist(self,request):
        print(self.num,request)

class RoleConfig(StarkConfig):

    def changelist(self,request):
        print('666')

# 创建了一个列表,列表中有三个对象(实例)
# [ StarkConfig对象(num=1), StarkConfig对象(num=2), RoleConfig对象(num=3) ]
config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)]
for item in config_obj_list:
    print(item.num)
# 1 2 3

# ### 4.
 

class StarkConfig(object):

    def __init__(self,num):
        self.num = num

    def changelist(self,request):
        print(self.num,request)

class RoleConfig(StarkConfig):
    pass
#
# # 创建了一个列表,列表中有三个对象(实例)
# [ StarkConfig对象(num=1), StarkConfig对象(num=2), RoleConfig对象(num=3) ]
config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)]
for item in config_obj_list:
    item.changelist(168)

# #### 5
 

class StarkConfig(object):

    def __init__(self,num):
        self.num = num

    def changelist(self,request):
        print(self.num,request)

class RoleConfig(StarkConfig):

    def changelist(self,request):
        print(666,self.num)

# 创建了一个列表,列表中有三个对象(实例)
# [ StarkConfig对象(num=1), StarkConfig对象(num=2), RoleConfig对象(num=3) ]
config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)]
for item in config_obj_list:
    item.changelist(168)

# #### 6

 

class StarkConfig(object):

    def __init__(self,num):
        self.num = num

    def changelist(self,request):
        print(self.num,request)

    def run(self):
        self.changelist(999)

class RoleConfig(StarkConfig):

    def changelist(self,request):
        print(666,self.num)

config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)]
config_obj_list[1].run()
config_obj_list[2].run() # 666 3

# #### 7

 

class StarkConfig(object):

    def __init__(self,num):
        self.num = num

    def changelist(self,request):
        print(self.num,request)

    def run(self):
        self.changelist(999)

class RoleConfig(StarkConfig):

    def changelist(self,request):
        print(666,self.num)


class AdminSite(object):
    def __init__(self):
        self._registry = {}

    def register(self,k,v):
        self._registry[k] = v

site = AdminSite()
print(len(site._registry)) # 0
site.register('range',666)
site.register('shilei',438)
print(len(site._registry)) # 2

site.register('lyd',StarkConfig(19))
site.register('yjl',StarkConfig(20))
site.register('fgz',RoleConfig(33))

print(len(site._registry)) # 5

 

# #### 8
 

class StarkConfig(object):

    def __init__(self,num):
        self.num = num

    def changelist(self,request):
        print(self.num,request)

    def run(self):
        self.changelist(999)

class RoleConfig(StarkConfig):

    def changelist(self,request):
        print(666,self.num)

class AdminSite(object):
    def __init__(self):
        self._registry = {}

    def register(self,k,v):
        self._registry[k] = v

site = AdminSite()
site.register('lyd',StarkConfig(19))
site.register('yjl',StarkConfig(20))
site.register('fgz',RoleConfig(33))
print(len(site._registry)) # 3

for k,row in site._registry.items():
    row.changelist(5)

### 9
 

class StarkConfig(object):

    def __init__(self,num):
        self.num = num

    def changelist(self,request):
        print(self.num,request)

    def run(self):
        self.changelist(999)

class RoleConfig(StarkConfig):

    def changelist(self,request):
        print(666,self.num)

class AdminSite(object):
    def __init__(self):
        self._registry = {}

    def register(self,k,v):
        self._registry[k] = v

site = AdminSite()
site.register('lyd',StarkConfig(19))
site.register('yjl',StarkConfig(20))
site.register('fgz',RoleConfig(33))
print(len(site._registry)) # 3

for k,row in site._registry.items():
    row.run()

 

### 10
 

class UserInfo(object):
    pass

class Department(object):
    pass

class StarkConfig(object):

    def __init__(self,num):
        self.num = num

    def changelist(self,request):
        print(self.num,request)

    def run(self):
        self.changelist(999)

class RoleConfig(StarkConfig):

    def changelist(self,request):
        print(666,self.num)

class AdminSite(object):
    def __init__(self):
        self._registry = {}

    def register(self,k,v):
        self._registry[k] = v(k)

site = AdminSite()
site.register(UserInfo,StarkConfig)
site.register(Department,StarkConfig)
print(len(site._registry)) # 3
for k,row in site._registry.items():
    row.run()

 

# 总结:
"""
1. 对象中封装了什么?
2. self到底是谁?
"""