面向对象3

组合习题,主动调用其他成员

组合习题

第一题:

　　

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,列表中有三个实例对象
[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(999)

结果为:　　1 168

　　　　　 2 168

　　　　　 666 3

第二题:

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 changelift(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()

结果为:

　　1 999

　　2 999

　　666 3

第三题:

class StarkConfig(object):
    def __init__(self,num):
        self.num = num
    
    def changelist(self,request):
        print(self.num,changelist)

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

class RoleConfig(StarkConfig):
    def changelift(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("abc",666)
site.register("def",999)
print(len(site._registry))#2
　　
　　site.register("lyd",StarkConfig(19))
　　site.register("yjl",StarkConfig(20))
　　site.register("fgz",RoleConfig(30))
　　print(len(site._registry))#5

第四题:

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(21))

print(len(siter._registry))

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

结果为:

　　3

　　19　　5

　　20　　5

　　666　　33

第五题:

class StarkConfig(object):
    def __init__(self,num):
        self.num = num

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

    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("a",StarkConfig(19))
site.register("b",StarkConfig(20))
site.register("c",RoleConfig(33))
print(len(site._registry))

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

结果为:

　　3

　　19　　999

　　20　　999

　　666　　33

第六题:

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

class AdminSite(object):
    def __init__(self):
        self._registry[k] = v[k]

site = AdminSite()
site.register(UserInfo,StarkConfig)
site.register(Department,StarkConfig)
print(len(site._registry))

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

结果为:

　　类UserInfo　　999

　　类Department　　999

主动调用其他成员

　　方式1:

　　　　

class Base(object):
    def f1(self):
        print(1)

class Foo(object):
    def f1(self):
        print(2)
        Base.f1(self)

obj = Foo()
obj.f1()

#Base.实例方法(自己传self),与继承无关

　　方式2:按照类的继承顺序,查找下一个

class Foo(object):
    def f1(self):
        super().f1()
        print(1)

class Bar(object):
    def f1(self):
        print(2)

class Info(Foo,Bar):
    pass

obj = Foo()
obj.f1()
#2
#1