To get Parent and ChildProcess ID from process ID in Python

Question

I am trying to get the `ppid` of the process that I want. I used following code to get the pid ``` proc=subprocess.Popen('ps -ae | grep ruby', shell=True, stdout=subprocess.PIPE, ) output=proc.communicate()[0] str = output.split() ``` Now in the `str[0]`, I have the pid of the process say ruby, I want to get the parent process ID `ppid` and child process ID of the same process. I need this solution to be run on `Solaris as well as Red Hat Enterprise Linux` 6.0 Is there any way to get that like `getppid()` and `getchildid()`? Or do I need to do it by `grep` command again and splitting?

Accepted Answer

Using this code is a bad idea. Your code will not work on solaris. You can use 'psutil' library, that way you can keep your code independent of os. https://github.com/giampaolo/psutil

```
p = psutil.Process(7055)
parent_pid = p.ppid()
```

To get Parent and ChildProcess ID from process ID in Python

Solution

Problem