Python various adorner examples (PYTHON3)

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Various adorners in Python detailed _python_ script house
Http://www.jb51.net/article/63892.htm

One, function-type decorator:

1, the adorner has no parameters, is decorated object without parameters

1 defTest (func):2     def_test ():3         Print('Call the function {0}.'. Format (func.__name__))4         returnfunc ()5     return_test6 7 @test8 defsay ():9     Print('Hello,world')Ten  One Say () A  - Output: - Call the function say. theHello,world

2, the adorner has no parameters, the decorative object has parameters

1 defTest (func):2     def_test (*args,**kw):3         Print('Call the function {0}.'. Format (func.__name__))4         returnFunc (*args,**kw)5     return_test6 7 @test8 defSay (str1,length):9     Print(Str1[:length])Ten  OneSay'Hello,world', 5) A  - Output: - Call the function say. theHello

3, the adorner has parameters, is decorated object without parameters

1 defarg_test (str_arg):2     defTest (func):3         def_test ():4             Print('Call the function {0}.'. Format (func.__name__))5             Print(Str_arg)6             returnfunc ()7         return_test8     returnTest9 Ten@arg_test ('With Arg') One defsay (): A     Print('Hello,world') -  - Say () the  - Output: - Call the function say. - With Arg +Hello,world

if the adorner has default parameters, use @ arg_test (), non-parametric adorner directly with @arg_test

4, the adorner has parameters, is decorated object has parameters

1 defarg_test (str_arg):2     defTest (func):3         def_test (*args,**kw):4             Print('Call the function {0}.'. Format (func.__name__))5             Print(Str_arg)6             returnFunc (*args,**kw)7         return_test8     returnTest9 Ten@arg_test ('With Arg') One defSay (str1,length): A     Print(Str1[:length]) -  -Say'Hello,world', 5) the  - Output: - Call the function say. - With Arg +Hello

Second, class decorator

1, the adorner has no parameters, is decorated object without parameters

1 classTest (object):2     def __init__(self,func):3Self._func =func4 5     def __call__(self):6         Print('Call the function {0}.'. Format (Self._func.__name__))7         returnSelf._func ()8 9 @testTen defsay (): One     Print('Hello,world') A  - @test - defhehe (): the     Print('hehe') -  - Say () - hehe () +  - Output: + Call the function say. A Hello,world at Call the function hehe. -Hehe

2, the adorner has no parameters, the decorative object has parameters

1 classTest (object):2     def __init__(self,func):3Self._func =func4 5     def __call__(self,*args,**kw):6         Print('Call the function {0}.'. Format (Self._func.__name__))7         returnSelf._func (*args,**kw)8 9 @testTen defSay (str1,length): One     Print(Str1[:length]) A  -Say'Hello,world', 5) -  the Output: - Call the function say. -Hello

3, the adorner has parameters, is decorated object without parameters

1 classTest (object):2     def __init__(self,info='De_arg'):3Self._info =Info4 5     def __call__(self,func):6         def __call():7             Print(Self._info)8             Print('Call the function {0}.'. Format (func.__name__))9             returnfunc ()Ten         return __call One  A  - @test () - defsay (): the     Print('Hello,world') -  - Say () -  + Output: -De_arg
Call the function say.
22Hello,world

3, the adorner has parameters, is decorated object has parameters

1 classTest (object):2     def __init__(self,info='De_arg'):3Self._info =Info4 5     def __call__(self,func):6         def __call(*args,**kw):7             Print(Self._info)8             Print('Call the function {0}.'. Format (func.__name__))9             returnFunc (*args,**kw)Ten         return __call One  A  - @test () - defSay (str1,length): the     Print(Str1[:length]) -  -Say'Hello,world', 5) -  + Output: - De_arg + Call the function say. AHello

Python various adorner examples (PYTHON3)