Srinivas Nyayapati <shireen...@gmail.com> added the comment:
Here is my first pass at this. I propose the following sentence be added at the 
end section 8.4:

If you need to track related exceptions (exceptions during exception handling), 
you should use exception chaining. You can chain exceptions by using the 
``from`` clause. Just raise a new exception class or instance from an existing 
exception. The existing exception will be set as 
the cause for the new exception.

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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue37891>
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