[issue31368] Add os.preadv() and os.pwritev()

[YoSTEALTH]

YoSTEALTH <ritesh at stealthcentral.com> added the comment:

Thank you Pablo Galindo for your amazingly hard work. Also Victor Stinner for your guidance, thanks you :)

----------

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue31368>
_______________________________________