python装饰器的4种类型：函数装饰函数、函数装饰类、类装饰函数、类装饰类

摘自：https://blog.csdn.net/gezailushang/article/details/84291092 

https://blog.csdn.net/xiemanr/article/details/72510885

 

一：函数装饰函数

      
      
      
      

       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          def wrapFun(func):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def inner(a, b):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
                  print(
          
          
          
          'function name:', func.__name__)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
                  r = func(a, b)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
        
          
          
          
          return r
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          return inner
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          @wrapFun
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          def myadd(a, b):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          return a + b
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          print(myadd(
          
          
          
          2, 
          
          
          
          3))
         
         
         
         
        
        
        
        
      
      
      
      
     
     
     
     

二：函数装饰类

      
      
      
      

       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          def wrapClass(cls):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def inner(a):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
                  print(
          
          
          
          'class name:', cls.__name_
          
          
          
          _)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
        
          
          
          
          return cls(a)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          return inner
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          @wrapClass
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          class Foo():
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def __init__(self, a):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
        
          
          
          
          self.a = a
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def fun(self):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
                  print(
          
          
          
          'self.a =', 
          
          
          
          self.a)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          m = Foo(
          
          
          
          'xiemanR')
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          m.fun()
         
         
         
         
        
        
        
        
      
      
      
      

三：类装饰函数

      
      
      
      

       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          class ShowFunName():
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def __init__(self, func):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
        
          
          
          
          self._func = func
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def __call__(self, a):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
                  print(
          
          
          
          'function name:', 
          
          
          
          self._func.__name_
          
          
          
          _)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
        
          
          
          
          return 
          
          
          
          self._func(a)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          @ShowFunName
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          def Bar(a):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          return a
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          print(Bar(
          
          
          
          'xiemanR'))
         
         
         
         
        
        
        
        
      
      
      
      

四：类装饰类

      
      
      
      

       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          class ShowClassName(object):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def __init__(self, cls):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
        
          
          
          
          self._cls = cls
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def __call__(self, a):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
                  print(
          
          
          
          'class name:', 
          
          
          
          self._cls.__name_
          
          
          
          _)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
        
          
          
          
          return 
          
          
          
          self._cls(a)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          @ShowClassName
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          class Foobar(object):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def __init__(self, a):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
        
          
          
          
          self.value = a
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
    
          
          
          
          def fun(self):
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
                  print(
          
          
          
          self.value)
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         
 
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          a = Foobar(
          
          
          
          'xiemanR')
         
         
         
         
        
        
        
        
       
       
       
       

        
        
        
        

         
         
         
         

        
        
        
        
        
        
        
        

         
         
         
         

          
          
          
          a.fun()