concurrent-future-single-thread.py

from concurrent.futures import ThreadPoolExecutor
import time

def wait_function(x, y):
    print('Task(', x,'multiply', y, ') started')
    time.sleep(2)
    print('Task(', x,'multiply', y, ') completed')
    return x * y

with ThreadPoolExecutor(max_workers=1) as executor:
    future = executor.submit(wait_function, 3, 4)

    while True:
        if(future.running()):
            print("Task 1 running")
        elif(future.done()):
            print(future.result())
            break