"""
 thread_demo.py

 $ python3 thread_example.py
 main - starting thread1
 main - starting thread2
 main - sleep 10
  one - 1
  two - 1
  two - 2
  two - 3
  two - 4
  one - 2
  two - 5
  one - 3
  one - 4
  one - 5

 See https://docs.python.org/3/library/_thread.html

Jim Mahoney | cs.marlboro.college | MIT License | April 2018
"""

from _thread import start_new_thread
from time import sleep

def print_numbers(name, wait_sec, max=5):
    """ print ' <name> - <integer>' from 1 to max with a delay between lines """
    for i in range(1, max+1):
        print(" {} - {}".format(name, i))
        sleep(wait_sec)

def main():

    # spawn the first thread - it starts running "in parallel"
    print("main - starting thread1")
    thread1 = start_new_thread(print_numbers, ('one', 1.1))

    # spawn the second thread - it also starts running "in parallel"
    print("main - starting thread2")
    thread2 = start_new_thread(print_numbers, ('two', 0.3))

    # don't quit before the threads have time to run.
    print("main - sleeping for 10 sec.")
    sleep(10)

    # bye!
    print("main - exit.")

if __name__ == '__main__':
    main()