user47827: Does python-bitcoinlib and the Bitcoin Core functional test framework share code? Were changes ever pushed down/upstream?

user47827: script.py of the Bitcoin Core functional test framework contains a comment that it was initially modified from python-bitcoinlib.
There doesn't appear to have been any code sharing beyond that and certainly not any later changes pushed up/downstream.
I asked Kanzure (previous maintainer of python-bitcoinlib) on IRC about it and he said:

python-bitcoinlib is forked from a thing that was itself incorporated into bitcoin core's functional test framework or the thing it was forked from was from code in the bitcoin core repository, i forget the lineage exactly but python-bitcoinlib came later


47827: <p>Does <a href="https://github.com/petertodd/python-bitcoinlib" rel="nofollow noreferrer">python-bitcoinlib</a> and the Bitcoin Core <a href="https://github.com/bitcoin/bitcoin/tree/master/test/functional/test_framework" rel="nofollow noreferrer">functional test framework</a> share code? Were changes ever pushed down/upstream?</p>
 47827: <p><a href="https://github.com/bitcoin/bitcoin/blob/master/test/functional/test_framework/script.py" rel="nofollow noreferrer">script.py</a> of the Bitcoin Core functional test framework contains a comment that it was initially modified from python-bitcoinlib.</p>
<p>There doesn't appear to have been any code sharing beyond that and certainly not any later changes pushed up/downstream.</p>
<p>I asked Kanzure (previous maintainer of python-bitcoinlib) on IRC about it and he said:</p>
<blockquote>
<p>python-bitcoinlib is forked from a thing that was itself incorporated into bitcoin core's functional test framework or the thing it was forked from was from code in the bitcoin core repository, i forget the lineage exactly but python-bitcoinlib came later</p>
</blockquote>
