Private attributes / Methods in Python

[Henry]

HIi

Could someone give an example of private variables? I have read the 
"Private Variable" section in the tutorial that you can download at the 
Python site.  

But I don't fully under the "class VirtualAttribute" example, because I can 
still do

a = VirtualAttribute()
a.__setattr__("name","theValue")

So, if anyone has another example (other than the VirtualAttribute example) 
of private attributes / method in Python, that would be really good.

Thanks