Can you create an instance of a subclass with an existing instance of the base class?

[Lawrence D'Oliveiro]

In article <444e0fff$0$7724$636a55ce at news.free.fr>,
 bruno at modulix <onurb at xiludom.gro> wrote:

>Lawrence D'Oliveiro wrote:
>> In article <444cb1e3$0$28592$626a54ce at news.free.fr>,
>>  bruno at modulix <onurb at xiludom.gro> wrote:
>> 
>> 
>>>Lawrence D'Oliveiro wrote:
>>>(snip)
>>>
>>>>I think you're taking Python's OO-ness too seriously. One of the 
>>>>strengths of Python is that it can _look_ like an OO language without 
>>>>actually being OO.
>>>
>>>According to which definition of OO ?
>> 
>> Isn't there one?
>
>Your claim that Python "_look_ like an OO language without actually
>being OO" implicitely relies on a definition of OO - or is just
>meaningless.

Which nicely evades answering the question.