Antoon Pardon a écrit :
Well I find this a confusing behaviour on python's part. The fact
that instance.field can mean something different, depending on
where in a statement you find it, makes the behaviour inconsistent.
I know people in general here are against declarations, but declarations
could IMO provide more consistency here and thus more obvious behaviour.
Well just to show how confusing python can be, the following piece of
code.
| class Spam:
| eggs = [2, 3]
|
|
| sp1 = Spam()
| sp2 = Spam()
|
| print sp1.eggs, id(sp1.eggs)
| print sp2.eggs, id(sp2.eggs)
| print '--------------------'
|
| sp1.eggs += [4,]
|
| print sp1.eggs, id(sp1.eggs)
| print sp2.eggs, id(sp2.eggs)
| print '--------------------'
|
| Spam.eggs = [3,5]
|
| print sp1.eggs, id(sp1.eggs)
| print sp2.eggs, id(sp2.eggs)
| print '--------------------'
Which produces:
[2, 3] 1075958860
[2, 3] 1075958860
--------------------
[2, 3, 4] 1075958860
[2, 3, 4] 1075958860
--------------------
[2, 3, 4] 1075958860
[3, 5] 1075959084
--------------------
Well ... and could someone explain this behaviour ?
I don't catch it !
Pierre
--
http://mail.python.org/mailman/listinfo/python-list
