[ python-Bugs-1545463 ] New-style classes fail to cleanup attributes

[SourceForge.net]

Bugs item #1545463, was opened at 2006-08-23 14:24
Message generated for change (Comment added) made by belopolsky
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1545463&group_id=5470

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Python Interpreter Core
Group: Python 2.4
Status: Open
Resolution: None
Priority: 5
Submitted By: Alexander Belopolsky (belopolsky)
Assigned to: Nobody/Anonymous (nobody)
Summary: New-style classes fail to cleanup attributes

Initial Comment:
> cat x.py
class X(object):
    def __init__(self, x):
        self.x = x
        print 'creating X(%r)' % x

    def __del__(self):
        print 'deleting X(%r)' % self.x

class A(object):
    x = X('new')

class B:
    x = X('old')
> python x.py
creating X('new')
creating X('old')
deleting X('old')

Python 2.4.2 (#2, Jan 13 2006, 12:00:38)
Python 2.6a0 (trunk:51513M, Aug 23 2006, 14:17:11)

----------------------------------------------------------------------

>Comment By: Alexander Belopolsky (belopolsky)
Date: 2006-08-23 18:01

Message:
Logged In: YES 
user_id=835142

It looks like the class object is not deleted alltogether:



class X(object):
    def __init__(self, x):
        self.x = x
        print 'creating X(%r)' % x

    def __del__(self):
        print 'deleting X(%r)' % self.x
        
class A(object):
    x = X('new')

del A

Output:
creating X('new')
deleting X('new')



----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1545463&group_id=5470