On 2012-09-19, Pierre Tardy <tar...@gmail.com> wrote:
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>>
>> This has been proposed and discussed and even implemented many
>> times on this list and others.
>>
> I can find this question on SO
> http://stackoverflow.com/questions/4984647/accessing-dict-keys-like-an-attribute-in-python
> which is basically answered with this solution
>
> class AttributeDict(dict):
> __getattr__ = dict.__getitem__
> __setattr__ = dict.__setitem__
>
>
> but this does not allow recursive access, you would need to first convert
> all nested dictionaries to AttributeDict.
> a.b.c.d = 2 # fail
> a.b = dict(c=3)
> a.b.c=4 # fail
There is no way to control "recursive access" in Python. The statement
a.b.c = 2
is equivalent to the statements
o = a.b # o = a.__getattr__('b')
o.c = 2 # o.__setattr__('c', 2)
The way that the o.c assignment is handled is determined by the type of o
regardless of the type of a. If you're looking for a way to change only the
type of a and make a custom __(set|get)attr__ work for all dicts that are
indirectly referred to then there is no solution to your problem.
Oscar
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