Facundo Batista wrote:
Aargh! Bad explanation. Or at least you're missing something:
Not really. It's easier for me to show that id(3) is always the same and id() not, and let the kids see that's not so easy and you'll have to look deeper if you want to know better.
I think Guido was saying that it's important for them to know that mutable objects are never in danger of being shared, so you should at least tell them that much. Otherwise they may end up worrying unnecessarily that two of their lists might get shared somehow behind their back.