best way to code

[Peter Otten]

eric wrote:

> hi,
> 
> I need to find a "good" design pattern to instanciate, and add
> specific code all in one. Let me explain it :
> 
> I need to define "some" code, better be in a class, something like
> 
> class LinkA(object):
>     def mystuff(self):
>          <do something different>
> 
> class LinkB(object):
>     def mystuff(self):
>          <do something different again>
> 
> 
> AND I need an instance of this class
> { "stuff A": LinkA()
>   "stuff B": LinkB()
> }
> 
> This kind of code "would" be fine, I mean, the result effect in memory
> is fine for me.
> But I don't like the way I have to
> 1/ give a useless name to LinkA, linkB (there can be hundreds of names
> like that)
> 2/ I have to write it down two times (and that's one time too much)
> 
> any ideas ?
> 
> something like
> [
> new object():
>     def mystuff(self):
>        <do something>
> ,
> new object():
>     def mystuff(self):
>        <do something else>
> ]
> 
> would be really perfect (but I know it does not work, or at least, I
> don't know how to make it work)
> 
> In fact, I would like to define a class, and an instance in a single
> statement

>>> class Register:
...     def __init__(self):
...             self.items = []
...     def __call__(self, method):
...             class Link(object):
...                     mystuff = method
...             self.items.append(Link())
...
>>> register = Register()
>>> @register
... def mystuff(self): print "first"
...
>>> @register
... def mystuff(self): print "second"
...
>>> for item in register.items:
...     item.mystuff()
...
first
second

Peter