problem in using subprocess module

[snippsat]

hi snippet
I am not familiar with the subprocess library and your code:

response = subprocess.run(['ping', '-n' ,'4', 'python-forum.io'], capture_output=True, encoding='utf-8')

how(where) can I gain more info about the above code?

To explain the basic of this,so ping is a external program ping.exe that you have on your OS Windows .
From cmd:

C:\>ping -n 4 python-forum.io

Pinging python-forum.io [172.67.168.227] with 32 bytes of data:
Reply from 172.67.168.227: bytes=32 time=21ms TTL=53
Reply from 172.67.168.227: bytes=32 time=37ms TTL=53
Reply from 172.67.168.227: bytes=32 time=32ms TTL=53
Reply from 172.67.168.227: bytes=32 time=35ms TTL=53

Ping statistics for 172.67.168.227:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 21ms, Maximum = 37ms, Average = 31ms 

So it's a way to take a external programs into Python,and run it if program have output can also catch that.
Like this will just start FireFox from Python.

import subprocess

subprocess.run(['C:/Program Files (x86)/Mozilla Firefox/firefox.exe'])

Look at Doc for eg run().