automatic accessors to a member var dict elements?

[Jeff Shannon]

Nick Craig-Wood wrote:

>>>>class MyClass(object):        # ensure a new-style class
>>>>        
>>>>
>...     def __init__(self):
>...         self.m_dict = {'one':1, 'two':2, 'three':3}
>...     def __getattr__(self, attr):
>...         value = self.m_dict.get(attr, None)
>...         if value is None:
>...             raise AttributeError(attr)
>...         return value
>...     def __setattr__(self, attr, value):
>...         self.m_dict[attr] = value
>... 
>  
>
>>>>obj = MyClass()
>>>>        
>>>>
>Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>  File "<stdin>", line 3, in __init__
>  File "<stdin>", line 10, in __setattr__
>  File "<stdin>", line 5, in __getattr__
>  File "<stdin>", line 5, in __getattr__
>  File "<stdin>", line 5, in __getattr__
>  File "<stdin>", line 5, in __getattr__
>  File "<stdin>", line 5, in __getattr__
>[snip]
>  File "<stdin>", line 5, in __getattr__
>  File "<stdin>", line 5, in __getattr__
>RuntimeError: maximum recursion depth exceeded
>
>I know there is something different about new style classes in this
>area, but thats not it!
>  
>

Hmmm... Actually, I think that the problem here is that during 
__init__(), we're trying to set the attribute m_dict, which doesn't 
exist yet, so it tries to look in self.m_dict to find it...

Modifying __init__() so to use self.__dict__['m_dict'] instead of 
self.m_dict will likely fix this.  (But I still haven't tested it...)

Jeff Shannon
Technician/Programmer
Credit International