[Twisted-Python] code coverage when code executed in a twisted worker thread

[Kyle Altendorf]

On November 29, 2018 8:10:41 AM EST, Chris Withers <chris at withers.org> wrote:
>I've noticed that code coverage doesn't appear to be recorded when code
>
>is executed in something that has been deferToThread'ed.
>
>Is this a known issue? Does anyone have an explanation?

Are you using coverage.py?  I don't know offhand but does Twisted use `thread` or `threading`? 

https://coverage.readthedocs.io/en/coverage-4.2/trouble.html#things-that-don-t-work