threads.py

# Example shown on this video
# https://www.youtube.com/watch?v=GPz49npOKzQ
# that I re-written in python
#
# Python 3 is required


import threading
import time

thread_group = []

def hard_task(name):
  for number in range(1, 10):
    time.sleep(1)
    print('Hard task {}...'.format(name))
  
  print('Hard task {} Done!'.format(name))

def handle_all_threads():
  for thread in thread_group:
    thread.join()
  
  print('All tasks Done!')

def init():
  for i in range(1, 10):
    thread = threading.Thread(
      target = hard_task,
      args = (str(i))
    )
    thread.start()
    thread_group.append(thread)
  
  handle_all_threads() 

init()