On Thursday, June 24, 2021 at 12:48:33 PM UTC-5 Edward K. Ream wrote:

> This is PR #2003 <https://github.com/leo-editor/leo-editor/pull/2003> and 
> issue #2004 <https://github.com/leo-editor/leo-editor/issues/2004>.
>
> Unless I hear compelling arguments against, I plan to "freeze" all the 
> classes in leoNodes.py (Position, VNode, NodeIndices and PosList classes) 
> by defining a __slot__ attribute 
> <https://docs.python.org/3/reference/datamodel.html#slots>for each class.
>

Adding slots prevents plugins from directly injecting attributes into 
Position objects.

#2015 <https://github.com/leo-editor/leo-editor/issues/2015> suggests 
adding p.pluginDict as a workaround.

All comments welcome.

Edward

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