On Nov 8, 1:08 am, Steven D'Aprano <[EMAIL PROTECTED] cybersource.com.au> wrote: > On Sat, 08 Nov 2008 18:31:47 +1300, greg wrote:
<Quote in favor of Steven snip> <Example in favor of Steven snip> > There's no "obviously" about it. To anyone who has learned that "call-by- > value" means that a copy is made, "obviously" it does mean copying the > value. If you have learned a different meaning, then you will believe > differently. I don't think it's obvious to everyone what a copy constructor is and when it's called. That's ok, it's something you can learn. I think Joe's idea is that you can think of every variable in Python as a pointer, and that clears up some confusions about its variable model. What happens when a pointer is copied? What is an example of copying a pointer in spoken language? >>> a= [ 1, 2, 3 ] Are the following true? The value of 'a' is an object. The value of that object is [ 1, 2, 3 ]. The value of 'a' is [ 1, 2, 3 ]. If so, 'value' is ambiguous and therefore not very useful as a term. -- http://mail.python.org/mailman/listinfo/python-list
