[issue16551] Cleanup the pure Python pickle implementation

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Here is an updated patch which get rid of trick with attribute caching. Globals used instead. Also added some minor style changes (dropped redundant semicolons and wrapped too long lines).

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Added file: http://bugs.python.org/file29732/pickle_cleanup_globals.patch

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