[issue9226] erroneous behavior when creating classes inside a closure

Chris Monsanto report at bugs.python.org
Sun Jul 11 21:56:36 CEST 2010

New submission from Chris Monsanto <chris at monsan.to>:

I have a function whose closure contains a local variable that shadows a global variable (lets call it x). If I create a class as follows: 

class Test(object): x = x

Test.x will contain the value of the global x, not the local x. This ONLY happens when the names are the same, and it only happens in the class body; i.e., "class Test(object): y = x" and class "Test(object): pass; Test.x = x" work fine.

However, if there is an assignment x = x AND you make other assignments, such as y = x, in the body, the other variables will have the wrong value too.

Test case attached. Problem noticed on Python 2.6.2 on Windows and 2.6.5 on Linux.

files: test.py
messages: 110037
nosy: monsanto
priority: normal
severity: normal
status: open
title: erroneous behavior when creating classes inside a closure
versions: Python 2.6
Added file: http://bugs.python.org/file17950/test.py

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