Non-blocking real-time plotting

[woooee]

You might want to try using a multiprocessing Manager list or dictionary. You can write to it in a process or processes, and can plot from it in another process. This is a simple program that uses a Manager list. It does not plot in real time, but the list creation and use is the same. One of the docs on the web https://pymotw.com/3/multiprocessing/

import random
import time
from multiprocessing import Process, Manager

def add_em(process_num, add_list, mgr_list):
    total=0
    for num in add_list:
         total += num

    mgr_list.append([process_num, total, add_list])

manager = Manager()
mgr_list = manager.list()

processes_list=[]
## start 10 processes
for ctr in range(10):
    ## how many numbers to add up
    length_nums=random.randint(2, 11)
    add_list=[]
    for num in range(length_nums):
        add_list.append(random.randint(1, 100))
    p=Process(target=add_em, args=(ctr, add_list, mgr_list))
    p.start()
    processes_list.append(p)

print("waiting for processes to finish")
for p in processes_list:
    if p.is_alive():
        print("     ", p.name, p.pid, p.is_alive())
        time.sleep(0.5)

print("\nAll processes finished")
import pprint
pprint.pprint(list(mgr_list))