import subprocess as sub
import threading as th
import time
 
def startrar():
    with open("test.log", "wb+") as file:
        rar = sub.run('"C:\\Program Files\\WinRAR\\Rar.exe" a -r -ep1 -v1g "D:\\mysqlrar" "D:\\Аудиокниги\\book"',
           shell=True, stdout=file, stderr=sub.PIPE)
 
def printpipe():
    while True:
        with open("test.log", "rb") as file:
            print(file.read().decode('cp1251'))
        time.sleep(1)
 
threads = []
threads.append(th.Thread(target=startrar))
threads.append(th.Thread(target=printpipe))
 
for i in threads:
    i.start()

c = [a, b]
with open('1', 'wb') as dump:
    pickle.dump(c, dump)