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标题：[python-chinese] Python中如何实现类似Java中反射的功能?

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徐继哲

楼主 2006年02月23日星期四 12:56

ajax chelsea ajaxchelsea at gmail.com
Thu Feb 23 12:56:16 HKT 2006

就是根据一个字符串形式的类名创建这个类的实例? 根据一个字符串形式的方法名调用这个方法?
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徐继哲

0楼 2006年02月23日星期四 13:16

超群李 achilles.lee at gmail.com
Thu Feb 23 13:16:48 HKT 2006

getattr(modulename,classname)

On 2/23/06, ajax chelsea <ajaxchelsea at gmail.com> wrote:
>
> 就是根据一个字符串形式的类名创建这个类的实例? 根据一个字符串形式的方法名调用这个方法?
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徐继哲

0楼 2006年02月23日星期四 13:17

超群李 achilles.lee at gmail.com
Thu Feb 23 13:17:20 HKT 2006

invoke方法也一样。都是用getattr(class,attributename)

On 2/23/06, 超群李 <achilles.lee at gmail.com> wrote:
>
> getattr(modulename,classname)
>
> On 2/23/06, ajax chelsea <ajaxchelsea at gmail.com> wrote:
> >
> > 就是根据一个字符串形式的类名创建这个类的实例? 根据一个字符串形式的方法名调用这个方法?
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese at lists.python.cn
> > Subscribe: send subscribe to python-chinese-request at lists.python.cn
> > Unsubscribe: send unsubscribe to
> > python-chinese-request at lists.python.cn
> > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> >
> >
>
>
> --
> 李超群
> mobile phone:13759961869
> office phone:029-87607341
>



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徐继哲

0楼 2006年02月23日星期四 13:25

ajax chelsea ajaxchelsea at gmail.com
Thu Feb 23 13:25:45 HKT 2006

ok,是这样吗:

my_class_def = getattr("mymodule", "MyClass")

inst = my_class_def( some params for __init__ of MyClass)

然后inst就是MyClass的实例了?


在06-2-23，超群李 <achilles.lee at gmail.com> 写道：
>
> invoke方法也一样。都是用getattr(class,attributename)
>
> On 2/23/06, 超群李 <achilles.lee at gmail.com> wrote:
> >
> > getattr(modulename,classname)
> >
> > On 2/23/06, ajax chelsea < ajaxchelsea at gmail.com> wrote:
> > >
> > > 就是根据一个字符串形式的类名创建这个类的实例? 根据一个字符串形式的方法名调用这个方法?
> > > _______________________________________________
> > > python-chinese
> > > Post: send python-chinese at lists.python.cn
> > > Subscribe: send subscribe to python-chinese-request at lists.python.cn
> > > Unsubscribe: send unsubscribe to
> > > python-chinese-request at lists.python.cn
> > > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> > >
> > >
> >
> >
> > --
> > 李超群
> > mobile phone:13759961869
> > office phone:029-87607341
> >
>
>
>
> --
> 李超群
> mobile phone:13759961869
> office phone:029-87607341
>
> _______________________________________________
> python-chinese
> Post: send python-chinese at lists.python.cn
> Subscribe: send subscribe to python-chinese-request at lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request at lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
>
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徐继哲

0楼 2006年02月23日星期四 13:30

超群李 achilles.lee at gmail.com
Thu Feb 23 13:30:55 HKT 2006

对。


On 2/23/06, ajax chelsea <ajaxchelsea at gmail.com> wrote:
>
> ok,是这样吗:
>
> my_class_def = getattr("mymodule", "MyClass")
>
> inst = my_class_def( some params for __init__ of MyClass)
>
> 然后inst就是MyClass的实例了?
>
>
> 在06-2-23，超群李 <achilles.lee at gmail.com> 写道：
> >
> > invoke方法也一样。都是用getattr(class,attributename)
> >
> > On 2/23/06, 超群李 <achilles.lee at gmail.com > wrote:
> > >
> > > getattr(modulename,classname)
> > >
> > > On 2/23/06, ajax chelsea < ajaxchelsea at gmail.com > wrote:
> > > >
> > > > 就是根据一个字符串形式的类名创建这个类的实例? 根据一个字符串形式的方法名调用这个方法?
> > > > _______________________________________________
> > > > python-chinese
> > > > Post: send python-chinese at lists.python.cn
> > > > Subscribe: send subscribe to python-chinese-request at lists.python.cn
> > > > Unsubscribe: send unsubscribe to   python-chinese-request at lists.python.cn
> > > >
> > > > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> > > >
> > > >
> > >
> > >
> > > --
> > > 李超群
> > > mobile phone:13759961869
> > > office phone:029-87607341
> > >
> >
> >
> >
> > --
> > 李超群
> > mobile phone:13759961869
> > office phone:029-87607341
> >
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese at lists.python.cn
> > Subscribe: send subscribe to python-chinese-request at lists.python.cn
> > Unsubscribe: send unsubscribe to
> > python-chinese-request at lists.python.cn
> > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> >
> >
>
> _______________________________________________
> python-chinese
> Post: send python-chinese at lists.python.cn
> Subscribe: send subscribe to python-chinese-request at lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request at lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
>


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office phone:029-87607341
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徐继哲

0楼 2006年02月23日星期四 19:02

唐晓平 xiaoping.tang at gmail.com
Thu Feb 23 19:02:27 HKT 2006

主意下 my_class_def = getattr(mymodule, "MyClass")

mymodule 不可以用字符串表达


On 2/23/06, ajax chelsea <ajaxchelsea at gmail.com> wrote:
>
> ok,是这样吗:
>
> my_class_def = getattr("mymodule", "MyClass")
>
> inst = my_class_def( some params for __init__ of MyClass)
>
> 然后inst就是MyClass的实例了?
>
>
> 在06-2-23，超群李 <achilles.lee at gmail.com> 写道：
> >
> > invoke方法也一样。都是用getattr(class,attributename)
> >
> > On 2/23/06, 超群李 <achilles.lee at gmail.com > wrote:
> > >
> > > getattr(modulename,classname)
> > >
> > > On 2/23/06, ajax chelsea < ajaxchelsea at gmail.com > wrote:
> > > >
> > > > 就是根据一个字符串形式的类名创建这个类的实例? 根据一个字符串形式的方法名调用这个方法?
> > > > _______________________________________________
> > > > python-chinese
> > > > Post: send python-chinese at lists.python.cn
> > > > Subscribe: send subscribe to python-chinese-request at lists.python.cn
> > > > Unsubscribe: send unsubscribe to   python-chinese-request at lists.python.cn
> > > >
> > > > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> > > >
> > > >
> > >
> > >
> > > --
> > > 李超群
> > > mobile phone:13759961869
> > > office phone:029-87607341
> > >
> >
> >
> >
> > --
> > 李超群
> > mobile phone:13759961869
> > office phone:029-87607341
> >
> > _______________________________________________
> > python-chinese
> > Post: send python-chinese at lists.python.cn
> > Subscribe: send subscribe to python-chinese-request at lists.python.cn
> > Unsubscribe: send unsubscribe to
> > python-chinese-request at lists.python.cn
> > Detail Info: http://python.cn/mailman/listinfo/python-chinese
> >
> >
>
> _______________________________________________
> python-chinese
> Post: send python-chinese at lists.python.cn
> Subscribe: send subscribe to python-chinese-request at lists.python.cn
> Unsubscribe: send unsubscribe to  python-chinese-request at lists.python.cn
> Detail Info: http://python.cn/mailman/listinfo/python-chinese
>
>
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李迎辉

0楼 2006年02月23日星期四 21:13

limodou limodou at gmail.com
Thu Feb 23 21:13:16 HKT 2006

On 2/23/06, ajax chelsea <ajaxchelsea at gmail.com> wrote:
> 就是根据一个字符串形式的类名创建这个类的实例? 根据一个字符串形式的方法名调用这个方法?

使用__import__可以根据一个字符串导入一个模块，而这个模块就是一个普通的模块。然后再通过名字从模块中取出真正的类。使用getattr()即可。

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