So to be very clear: def foo(x): x['a'] = 1 y = {'b': 2} foo(y) print(y) foo can modify the object y points to, but it can't make y point to a

So to be very clear: def foo(x): x['a'] = 1 y = {'b': 2} foo(y) print(y) foo can modify the object y points to, but it can't make y point to a different object? Is that what "This is impossible in Python" is referring to?