>>>>> "E" == Eric Jacoboni <jaco / teaser.fr> writes:

E> In fact, "my head" has some problem to justify that there is two
E> objects of different classes that can be assigned to each other (i'm
E> rather experienced with strong typing languages).

 Just see variables and not objects. For example :

 a = b = "abc"

 there are 2 variables but one object.

 a = [1, 2]

 there are 1 variable but three objects

Guy Decoux