組合補充,主動調用其他類的成員,特殊成員
阿新 • • 發佈：2018-08-30
items isp register src ddb img with turn sed 
一丶組合補充
1.類或對象是否能做字典的key
1 class Foo: 2 pass 3 4 user_info = { 5 Foo:1, 6 Foo():5 7 } 8 9 print(user_info)類做key
2.對象中到底有什麽?
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.燒腦練習 top 1
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‘) # 創建了一個列表,列表中有三個對象(實例) # [ StarkConfig對象(num=1), StarkConfig對象(num=2), RoleConfig對象(num=3) ] config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)] for item in config_obj_list: print(item.num)
4.燒腦練習top2
class StarkConfig(object): def __init__(self,num): self.num...= num def changelist(self,request): print(self.num,request) class RoleConfig(StarkConfig): pass # 創建了一個列表,列表中有三個對象(實例) # [ StarkConfig對象(num=1), StarkConfig對象(num=2), RoleConfig對象(num=3) ] config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)] for item in config_obj_list: item.changelist(168)
5.燒腦練習top3
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) # 創建了一個列表,列表中有三個對象(實例) # [ StarkConfig對象(num=1), StarkConfig對象(num=2), RoleConfig對象(num=3) ] config_obj_list = [StarkConfig(1),StarkConfig(2),RoleConfig(3)] for item in config_obj_list: item.changelist(168)...
6.燒腦練習top4
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.燒腦練習top5
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.燒腦練習top6
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.燒腦練習top7
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.燒腦練習top8
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()...
二丶主動調用其他類的成員
方法一:
class Base(object): def f1(self): print(‘5個功能‘) class Foo(object): def f1(self): print(‘3個功能‘) Base.f1(self) obj = Foo() obj.f1(
總結:Base.實例方法(自己上傳self)
與繼承能力無關
方法二:
class Foo(object): def f1(self): super().f1() print(‘3個功能‘) class Bar(object): def f1(self): print(‘6個功能‘) class Info(Foo,Bar): pass # obj = Foo() # obj.f1() obj = Info() obj.f1()
三丶特殊成員
1.類名() 自動執行__init__
class Foo(object): def __init__(self,a1,a2): self.a1 = a1 self.a2 = a2
obj = Foo(1,2)
2.對象() 自動執行__call__
def __call__(self, *args, **kwargs): print(11111,args,kwargs) return 123
ret = obj(6,4,2,k1 = 456)
3.對象[‘xx‘] 自動執行__getitem__
def __setitem__(self, key, value): print(key,value,111111111) ret = obj[‘yu‘] print(ret)
4.對象[‘xx‘] = 11 自動執行__setitem__
def __setitem__(self, key, value): print(key,value,111111111) obj[‘k1‘] = 123
5.del 對象[xx] 自動執行__delitem__
def __delitem__(self, key): print(key) del obj[‘uuu‘]
6.對象+對象 自動執行__add__
def __add__(self, other): return self.a1 + other.a2 obj1 = Foo(1,2) obj2 = Foo(88,99) ret = obj2 + obj1 print(ret)
7.with 對象 自動執行 __enter/__exit__
def __enter__(self): print(‘1111‘) return 999 def __exit__(self, exc_type, exc_val, exc_tb): print(‘22222‘) obj = Foo(1,2) with obj as f: print(f) print(‘內部代碼‘)
8.真正的構造方法
class Foo(object): def __init__(self, a1, a2): # 初始化方法 """ 為空對象進行數據初始化 :param a1: :param a2: """ self.a1 = a1 self.a2 = a2 def __new__(cls, *args, **kwargs): # 構造方法 """ 創建一個空對象 :param args: :param kwargs: :return: """ return object.__new__(cls) # Python內部創建一個當前類的對象(初創時內部是空的.). obj1 = Foo(1,2) print(obj1) obj2 = Foo(11,12) print(obj2)構造方法
組合補充,主動調用其他類的成員,特殊成員