import os
import random
import threading
import time
from multiprocessing import Process, Queue


def write_and_read(q, write_threads_count):
    write_threads = [threading.Thread(target=write, args=(q,)) for _ in range(write_threads_count)]
    read_thread = threading.Thread(target=read, args=(q,))

    for thread in write_threads:
        thread.start()
    read_thread.start()

    for thread in write_threads:
        thread.join()
    read_thread.join()


def write(q):
    for value in ["A", "B", "C"]:
        print(f"Put {value} to queue from {threading.current_thread().name}")
        q.put(value)
        time.sleep(random.random())


def read(q):

    while True:
        try:
            value = q.get(timeout=2)
            print(f"Get {value} from queue.")
        except Exception:
            # queueが空
            break


def main():
    q = Queue()
    write_threads_count = 1
    write_and_read_process = Process(target=write_and_read, args=(q, write_threads_count))
    write_and_read_process.start()
    write_and_read_process.join()


if __name__ == "__main__":
    main()