[Python-bugs-list] [ python-Bugs-671439 ] fix for 569257 isn't in 2.2.2 - __slots__ still not mangled

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Bugs item #671439, was opened at 2003-01-20 16:45
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https://sourceforge.net/tracker/?func=detail&atid=105470&aid=671439&group_id=5470

Category: Type/class unification
Group: Python 2.2.2
Status: Open
Resolution: None
Priority: 5
Submitted By: Jess Austin (jessaustin)
Assigned to: Nobody/Anonymous (nobody)
Summary: fix for 569257 isn't in 2.2.2 - __slots__ still not mangled

Initial Comment:
hi,

Perhaps this isn't the right way to notify you that a patch 
didn't make it in.  If so I'm sorry.

I'm concerned that the fix for bug #569257 didn't make it 
into Python 2.2.2 on Windows.  My description of the 
bug, that I had written before I noticed #569257, follows.  
The original bug seems to have been resolved last June.  
I would have expected it to show up in 2.2.2.

thanks,
Jess Austin




<description of bug>

Variables listed in __slots__ for a new-style class that 
start with double underscores are not mangled.  
Entering the following code:

class a(object):
    __slots__ = ['__x']
    def __init__(self, x):
        self.__x = x
    
m = a(1)

Yields the following exception:

Traceback (most recent call last):
  File "<input>", line 1, in ?
  File "<input>", line 4, in __init__
AttributeError: 'a' object has no attribute '_a__x'

Whereas entering the following returns 1 just as one 
would expect:

class b(object):
    __slots__ = ['_b__x']
    def __init__(self, x):
        self.__x = x
    
n = b(1)
n._b__x

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=671439&group_id=5470