本文实例讲述了Python装饰器用法。分享给大家供大家参考,具体如下:
下面的程序示例了python装饰器的使用:
示例一:
def outer(fun): print fun def wrapper(arg): result=fun(arg) print 'over!' return result return wrapper@outerdef func1(arg): print 'func1',arg return 'very good!'response=func1('python')print responseprint func1
运行结果:
<function func1 at 0x02A67D70>func1 pythonover!very good!<function wrapper at 0x02A67CF0>
示例二:
#!/usr/bin/env python#coding:utf-8def Filter(before_func,after_func): print before_func print after_func def outer(main_func): print 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 outerdef before(request,kargs): print request,kargs,'之前!'def after(request,kargs): print request,kargs,'之后!'@Filter(before,after)def main(request,kargs): print request,kargsmain('hello','python')print main
运行结果:
<function before at 0x02AC7BF0><function after at 0x02AC7C30><function main at 0x02AC7CF0>hello python 之前!hello pythonhello python 之后!<function wrapper at 0x02AC7D30>
我们可以加上很多断点,在Debug模式下运行,查看程序一步一步的运行轨迹。。。
希望本文所述对大家Python程序设计有所帮助。
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