[Python-Dev] PEP 574 ready for review

[Antoine Pitrou]

Hello,

I've put the final touches to PEP 574 - Pickle protocol 5 with
out-of-band data (*).  It is now ready for review.  The implementation
is fully functional, as well as its PyPI backport (**), and has
regression tests against Numpy.  Numpy and PyArrow have their own tests
against the pickle5 backport.

(*) https://www.python.org/dev/peps/pep-0574/

(**) https://pypi.org/project/pickle5/

Regards

Antoine.