Apologies for self-replying,
On 01/12/15 22:34, Erik wrote:
what you're asking for is that
the *container* object whose element is being assigned to is first
queried as to whether it will accept a mutated element being assigned to
it before that element is mutated.
What I said above is rubbish. The situation is approximately similar to:
a = [4, 5, 6]
t = ([1, 2, 4], a)
a.append(7)
a.append(8)
a.append(9)
The point is, you're mutating something that an immutable object
contains. In the example you give, that's caught because of the
subsequent explicit assignment.
In the example above, it's not caught. But it's the same thing.
E.
--
https://mail.python.org/mailman/listinfo/python-list
