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I'm wrong or Will we fix the ducks limp?

On 09/06/2016 10:46, Antoon Pardon wrote:
> Op 09-06-16 om 09:36 schreef Steven D'Aprano:

>> Your example demonstrates object mutation, not assignment.
> Generally assignment and mutation don't contradict each other.
> So IMO the cause is the same, a mutation. In some languages you
> can mutate your variable through an assignment and in others you
> can't.

I think this is what is confusing you.

Mutation is like repairing or customising my car.

Full assignment is like buying a new car.

The two are very different, even though they might involve the same "=" 

Python object references work like the registration (license) plate on a 
car. Whatever you do via that, it will be the same car.

Full references require the address of the house.