关于组合(嵌套)的补充和实例

一、对象和类可以做字典的key

class Foo:
    pass

user_info = {
    Foo:1,   #类做key
    Foo():5  # 对象做key
}

print(user_info)

二、把对象作为列表里的元素
1、

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())

2、

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)
   # 1 168、2 168、3 168

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)

# 1 168、2 168、666 3

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() # 2 999
 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、

(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)
    # 19 5、20 5、666 33

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()
  # 19 999、20 999、 666 33

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()
 # <class '__main__.UserInfo'> 999
 # <class '__main__.Department'> 999