Problem with global variables inside and outside processes in python multiprocessing

Question

Here's my code:

import multiprocessing as mp

var = 1

def p1func():
  global var
  var += 1

p1 = mp.Process(target=p1func)

p1.start()

p1.join()

print(var)

the problem occurs when printing var.

(I am quite new to python so i am not that good, so dont be surprised if its something very obvious that i missed.) problem below.

The problem is that the output is 1, even when i made and ran a process to change to 2. Why is this? This code was made to test out multiprocessing for a larger project. I globalled the variable, did p1.join() to make sure the process was complete, but it still dosent work.

Any reasons wold be helpful, thank you.