Examples of threading

threading_examples.py

import threading
import time


# there's also a multiprocessing module which I haven't used because its easier to communicate between threads
#  than it is to communicate between processes

# for each section uncomment the code and run it


# 1. BASIC THREADING EXAMPLE
# def worker():
#     """thread worker function"""
#     for j in range(2):
#         print(j)
#         time.sleep(1)
#
#
# threads = []
# for i in range(5):
#     t = threading.Thread(target=worker)
#     threads.append(t)
#     t.start()
#
# for t in threads:
#     t.join()
# print('done')


# 2. ARGS THREADING EXAMPLE
# def worker(num):
#     """thread worker function"""
#     print(f'Worker: {num}')
#     return num
#
#
# threads = []
# for i in range(5):
#     t = threading.Thread(target=worker, args=(i,))
#     threads.append(t)
#     t.start()
# for t in threads:
#     t.join()
# print('DONE')

# 3. KWARGS THREADING EXAMPLE
# def kwargs_thread(num=10):
#     print(num)
#
#
# t = threading.Thread(target=kwargs_thread, kwargs={'num': 20})
# t.start()

# 4. DAEMON THREADING EXAMPLE
# daemon threads exit when all non-daemon threads are done. default value is False
# def daemon():
#     print('SLEEPING FOR 2 SECONDS')
#     time.sleep(2)
#     print('DONE SLEEPING')
#
#
# d = threading.Thread(name='daemon', target=daemon, daemon=True)
# d.start()

# 5. NON-DAEMON THREADING EXAMPLE
# def non_daemon():
#     print('STARTING TO SLEEP')
#     time.sleep(3)
#     print('DONE SLEEPING')
#
#
# t = threading.Thread(name='non-daemon', target=non_daemon)
# t.start()
# print(t.is_alive())
# t.join()
# print(t.is_alive())


# there are also locks and other threading related objects but its not worth learning until you actually need to use
# them (advanced topic)