An example of multi-threading in python using the threading module

multi.py

import threading
import time

def calc_square(numbers):
    print('calc square numbers')
    for n in numbers:
        time.sleep(0.2)
        print('square: ', n*n)


def calc_cube(numbers):
    print('calc cube numbers')
    for n in numbers:
        time.sleep(0.2)
        print('cube: ', n*n*n)


t = time.time()

a = range(0,5)

t1 = threading.Thread(target=calc_square, args=(a,))
t2 = threading.Thread(target=calc_cube, args=(a,))

t1.start()
time.sleep(0.1)
t2.start()

# wait for tasks to complete

t1.join()
t2.join()

print('time: ' + str(time.time() - t))