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  • 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

    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

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    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

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    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()
    
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  • 原文地址:https://www.cnblogs.com/python960410445/p/13934036.html
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