每日小题3

 

class StarkConfig:
    def __init__(self,num):
        self.num = num
    
    def run(self):
        self()
    
    def __call__(self, *args, **kwargs):
        print(self.num)

class RoleConfig(StarkConfig):
    def __call__(self, *args, **kwargs):
        print(345)
    def __getitem__(self, item):
        return self.num[item]

v1 = RoleConfig('alex')
v2 = StarkConfig('太白金星')
# print(v1[1])
# print(v2[2])
v1.run()
#对对象进行字典操作触发__getitem__

-------
class UserInfo:
    pass


class Department:
    pass


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


site = AdminSite()
site.register(UserInfo, StarkConfig)
# 1 
# obj = site._registry[UserInfo]()

# 2
obj = site._registry[UserInfo](100)
obj.run()

-------
class UserInfo:
    pass

class Department:
    pass

class StarkConfig:
    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:

    def __init__(self):
        self._registry = {}

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

site = AdminSite()
site.register(UserInfo,StarkConfig)
site.register(Department,RoleConfig)

for k,row in site._registry.items():
    row.run()
v(k)这步把k的地址写进去了
-------
class A:
    list_display = []
    
    def get_list(self):
        self.list_display.insert(0,33)
        return self.list_display

s1 = A()
print(s1.get_list())

-------
class A:
    list_display = [1, 2, 3]
    def __init__(self):
        self.list_display = []
    def get_list(self):
        self.list_display.insert(0, 33)
        return self.list_display


s1 = A()
print(s1.get_list())

------
class A:
    list_display = []

    def get_list(self):
        self.list_display.insert(0,33)
        return self.list_display

class B(A):
    list_display = [11,22]


s1 = A()
s2 = B()
print(s1.get_list())
print(s2.get_list())

1 2 3 4 5 6 7 8 9

def add(a, b):     return a + b def test():     for r_i in range(4):         yield r_i g = test() for n in [2, 10]:     g = (add(n, i) for i in g) print(list(g))

友情提示: 惰性机制,不到最后不会拿值

这个题先读一下,然后自己分析一下,在用机器运行一下