Yes, that is what I meant. And yeah, it is weird behavior. (I think of "d[k] = v" as "setting the key k to the value v", so that's why I said "setting a key". P

Yes, that is what I meant. And yeah, it is weird behavior. (I think of "d[k] = v" as "setting the key k to the value v", so that's why I said "setting a key". Perhaps "binding a key" would be clearer?)