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  • python 装饰器

    普通装饰器:

    def w1(func):
        def inner():
            # 验证1
            # 验证2
            # 验证3
            return func()
        return inner
     
    @w1
    def f1():
        print 'f1'
    

    加参数装饰器:

    def w1(func):
        def inner(*args,**kwargs):
            # 验证1
            # 验证2
            # 验证3
            return func(*args,**kwargs)
        return inner
     
    @w1
    def f1(arg1,arg2,arg3):
        print 'f1'
    

    多层装饰器:

    def w1(func):
        def inner(*args,**kwargs):
            # 验证1
            # 验证2
            # 验证3
            return func(*args,**kwargs)
        return inner
     
    def w2(func):
        def inner(*args,**kwargs):
            # 验证1
            # 验证2
            # 验证3
            return func(*args,**kwargs)
        return inner
     
     
    @w1
    @w2
    def f1(arg1,arg2,arg3):
        print 'f1'
    

    前后函数通用装饰器:

    #!/usr/bin/env python
    #coding:utf-8
      
    def Before(request,kargs):
        print 'before'
          
    def After(request,kargs):
        print 'after'
      
      
    def Filter(before_func,after_func):
        def outer(main_func):
            def wrapper(request,kargs):
                  
                before_result = before_func(request,kargs)
                if(before_result != None):
                    return before_result;
                  
                main_result = main_func(request,kargs)
                if(main_result != None):
                    return main_result;
                  
                after_result = after_func(request,kargs)
                if(after_result != None):
                    return after_result;
                  
            return wrapper
        return outer
          
    @Filter(Before, After)
    def Index(request,kargs):
        print 'index'
    

    加元信息装饰器:

    import functools
    
    def outer(func):
        @functools.wraps(func)
        def inner(*args, **kwargs):
            print(inner.__doc__)  # None
            return func()
        return inner
    
    @outer
    def function():
        """
        asdfasd
        :return:
        """
        print('func')
    
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  • 原文地址:https://www.cnblogs.com/goldd/p/5512782.html
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