Dynamically Defined Functions in Classes?

[Wolfgang Grafen]

Pieter Nagel wrote:
> 
> On Wed, 31 Jan 2001, Jim Meyer wrote:
> 
> > I have an application in which I wish to treat the members of a
> > dictionary as attributes;
> 
> class Bar:
>     def __init__(self, initial_dict):
>         self.__dict__ = initial_dict
> 
> b = Bar({'joe' : 'cool', 'frank' : 'lee', 'ron' : 'dell'})
> print b.joe
> b.frank = 'foo'
> 
> --
>      ,_
>      /_)              /| /
>     /   i e t e r    / |/ a g e l

Good idea!

Let's do a little additional stuff and you get:


class Bar(UserDict):
    def __init__(self,dict={}):
        UserDict.__init__(self,dict)
        self.data.update(self.__dict__)
        self.__dict__=self.data

>>> b=Bar({'a':1,'b':2)
>>> b
{'data': {...}, 'b': 2, 'a': 1}

>>> b.b
2

>>> b.a
1

>>> b['c']=3
>>> b
{'data': {...}, 'b': 2, 'c': 3, 'a': 1}

>>> b.c
3

>>> b['b']
2

Cheers,

Wolfgang