09-16-周二_11-03-29

02.面向对象/06.反射与双下方法.md

@@ -481,30 +481,31 @@ class A:
 
 ```python
 class Foo:
-    def __init__(self,name):
-        self.name=name
+    def __init__(self, name):
+        self.name = name
 
     def __getitem__(self, item):
         print(self.__dict__[item])
 
     def __setitem__(self, key, value):
-        self.__dict__[key]=value
+        self.__dict__[key] = value
         print('赋值成功')
-        
+
     def __delitem__(self, key):
         print('del obj[key]时,我执行')
         self.__dict__.pop(key)
-        
+
     def __delattr__(self, item):
         print('del obj.key时,我执行')
         self.__dict__.pop(item)
 
-f1=Foo('sb')
-f1['age']=18
-f1['age1']=19
+
+f1 = Foo('张三')
+f1['age'] = 18
+f1['age1'] = 19
 del f1.age1
 del f1['age']
-f1['name']='mingzi'
+f1['name'] = '李四'
 print(f1.__dict__)
 ```
 
@@ -549,8 +550,9 @@ class Diycontextor:
         self.filehander.close()
 
 
-with Diycontextor('config', 'r') as f:
-    for i in f:
+with Diycontextor('config', 'a+') as f:
+    f.seek(0)
+    for i in f.readlines():
         print(i.strip())
 ```
 
@@ -611,16 +613,16 @@ class RoleConfig(StarkConfig):
 class AdminSite:
 
     def __init__(self):
-        self._registry = {}
+        self.registry_db = {}
 
     def register(self, k, v):
-        self._registry[k] = v
+        self.registry_db[k] = v
 
 
 site = AdminSite()
 site.register(UserInfo, StarkConfig)
 # 1
-obj = site._registry[UserInfo]()
+obj = site.registry_db[UserInfo](100)
 
 # 2
 # obj = site._registry[UserInfo](100)
@@ -657,11 +659,15 @@ class AdminSite:
     def register(self,k,v):
         self._registry[k] = v(k)
 
+    @property
+    def registry_db(self):
+        return self._registry
+
 site = AdminSite()
 site.register(UserInfo,StarkConfig)
 site.register(Department,RoleConfig)
 
-for k,row in site._registry.items():
+for k,row in site.registry_db.items():
     row.run()
 ```