How to get the running process’ parent process’ ID in Python?

How to get the running process’ parent process’ ID in Python?

In Python, you can get the parent process’ pid by calling os.getppid():

import os

ppid = os.getppid()

One example:

The shell’s pid:

$ echo $$
21779

Start a python REPL and get its parent pid (the shell’s):

$ python
Python 2.7.5 (default, Nov  6 2016, 00:28:07) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-11)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> print os.getppid()
21779
>>>