<I>thread.py<I>

@li:from threading import Thread

import time

def gui():
    for i in range(10):
        print ('#',end='')
        time.sleep(1)

def work(how_long):
    time.sleep(how_long)

t1 = Thread(target=gui, name='Oberfläche', args=())
t1.start()

t2 = Thread(target=work, name='Verarbeitung', args=(2,))
t2.start()

t1.join()
t2.join()


@ü.li:Listing 2: <I>thread_event.py<I>

@li:from threading import Thread, Event

import time

def gui(e):
    while not e.is_set():
        e.wait(1)
        print ('#',end='')

def work(how_long,e):
    time.sleep(how_long)
    e.set()

e = Event()

t1 = Thread(target=gui, name='Oberfläche', args=(e,))
t1.start()

t2 = Thread(target=work, name='Verarbeitung', args=(2,e))
t2.start()

t1.join()
t2.join()


@ü.li:Listing 3: <I>lock.py<I>

@li:from threading import Lock
import time

value=1

def work(l):
    global value
    for i in range(5):
        l.acquire() #schaltet den Lock ein
        value+=1
        print(threading.currentThread().getName(),value)
        l.release() #schalten den Lock frei
        time.sleep(3)

l=Lock() #erzeugen
t1 = threading.Thread(target=work, args=(l,))
t1.start()
t2 = threading.Thread(target=work, args=(l,))
t2.start()

t1.join()
t2.join()


@ü.li:Listing 4: <I>process.py<I>

@li:from multiprocessing import Process
import time
import os

def test_it():
    print("test_it",os.getpid())
    time.sleep(3)
    

if __name__ == '__main__':
    print("main",os.getpid())
    p = Process(target=test_it)
    p.start()
    time.sleep(1)
    p.terminate()
    print("test_it is alive", p.is_alive())
    p.join()
    print(p.exitcode)


@ü.li:Listing 5: <I>pipe.py<I>

@li:from multiprocessing import Process, Pipe

def fun(conn):
    conn.send([42, None, 'hello'])
    conn.close()

if __name__ == '__main__':
    connection_1, connection_2 = Pipe()
    p = Process(target=fun, args=(connection_2,))
    p.start()
    print(connection_1.recv())
    p.join()


@ü.li:Listing 6:  <I>manager.py<I>

@li:from multiprocessing import Process, Manager

def fun(d, l):
    d[1] = 'eins'
    d[2] = 'zwei'
    l.reverse()

if __name__ == '__main__':
    mgr = Manager()
    d = mgr.dict()
    l = mgr.list(['a','b','c','d'])

    p = Process(target=fun, args=(d, l))
    p.start()
    p.join()

    print(d)
    print(l)