Starting threads. #2

thread_play.py

import threading
import time

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

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

arr = [2, 3, 8, 9]

t = time.time()

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

t1.start()
t2.start()

t1.join()
t2.join()

print("done in: ", time.time() - t )
print("Hah.. I am done with all my works now!")