Objects in Python

[Terry Reedy]

On 8/22/2012 10:59 AM, lipska the kat wrote:

> There is no real enforced concept of information hiding, no binding of
> type to variable in fact no concept of typing at all as far as I can
> see.

Given that type(valid_name) always returns a type(class), that is a 
slightly strange statement. What is true is that there is no concept of 
static type for names. In Python (and similar languages) type or class 
is a property of objects, not names. This goes alone with names being 
bound to objects rather than linear memory blocks. (Memory block is a 
machine implementation of the abstraction 'information object'.) And 
Python objects are more stfongly typed than in some other languages. 
Names are only dynamically and indirectly typed when they are bound to 
an object. Except for the few keyword names like None, True, etc, names 
can be rebound to another object of another type.

-- 
Terry Jan Reedy