In the Windows Help File for Python 3.5:

17.2 multiprocessing
17.2.1.1 The Process class
2nd code example: "To show the individual process IDs involved, here is an expanded example"

def info(title):
    print(title)
    print('module name:', __name__)
    if hasattr(os, 'getppid'):  # only available on Unix
        print('parent process:', os.getppid())
    print('process id:', os.getpid())

os.getppid() is now available on Windows, so you can remove the if statement.

To follow up on my previous message, I looked at the documentation for os.getppid().

It states:

Changed in version 3.2: Added support for Windows.

Here's a quick minor patch to fix, works on a re-compiled doc.

Good catch and agreed this should be cleaned up.

Patch looks good to me and given its nature is probably all we need although it's probably worth combining this minor documentation update so that it gets applied with some other documentation patch(es) at the same time.

New changeset 60b0bc23c69e by Berker Peksag in branch '3.4':
Issue #25169: os.getppid() is available on Windows since Python 3.2.
https://hg.python.org/cpython/rev/60b0bc23c69e

New changeset c6ccef432dc2 by Berker Peksag in branch '3.5':
Issue #25169: os.getppid() is available on Windows since Python 3.2.
https://hg.python.org/cpython/rev/c6ccef432dc2

New changeset 71a6d4c7cd01 by Berker Peksag in branch 'default':
Issue #25169: os.getppid() is available on Windows since Python 3.2.
https://hg.python.org/cpython/rev/71a6d4c7cd01

Fixed in 3.4, 3.5 and 3.6. Thanks all!