[issue21231] Issue a python 3 warning when old style classes are defined.

[Alex Gaynor]

New submission from Alex Gaynor:

This will assist in porting applications from Python2 to Python3.

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files: old-style-classes.diff
keywords: patch
messages: 216273
nosy: alex
priority: normal
severity: normal
status: open
title: Issue a python 3 warning when old style classes are defined.
type: enhancement
versions: Python 2.7
Added file: http://bugs.python.org/file34865/old-style-classes.diff

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<http://bugs.python.org/issue21231>
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