Tengo problemas al manejar con gracia una interrupción del teclado con el multiprocesamiento de python

(Sí, sé que Ctr-C no debería garantizar un cierre correcto, pero dejemos esa discusión para un tema diferente)

Considere el siguiente código, donde soy usuario unmultiprocessing.Manager#list() que es un ListProxy que entendí que maneja el acceso multiproceso a una lista.

Cuando presiono Ctr-C fuera de esto, obtengo unsocket.error: [Errno 2] No such file or directory al intentar acceder al ListProxy

Me encantaría que la lista compartida no se corrompa en Ctr-C. ¡¿Es posible?!

Nota: quiero resolver esto sin usar grupos y colas.

from multiprocessing import Process, Manager
from time import sleep

def f(process_number, shared_array):
    try:
        print "starting thread: ", process_number
        shared_array.append(process_number)
        sleep(3)
        shared_array.append(process_number)
    except KeyboardInterrupt:
        print "Keyboard interrupt in process: ", process_number
    finally:
        print "cleaning up thread", process_number

if __name__ == '__main__':

    processes = []

    manager = Manager()
    shared_array = manager.list()

    for i in xrange(4):
        p = Process(target=f, args=(i, shared_array))
        p.start()
        processes.append(p)

    try:
        for process in processes:
            process.join()
    except KeyboardInterrupt:
        print "Keyboard interrupt in main"

    for item in shared_array:
        # raises "socket.error: [Errno 2] No such file or directory"
        print item

Si ejecuta eso y luego presiona Ctr-C, obtenemos lo siguiente:

starting thread:  0
starting thread:  1
starting thread:  3
starting thread:  2
^CKeyboard interupt in process:  3
Keyboard interupt in process:  0
cleaning up thread 3
cleaning up thread 0
Keyboard interupt in process:  1
Keyboard interupt in process:  2
cleaning up thread 1
cleaning up thread 2
Keyboard interupt in main
Traceback (most recent call last):
  File "multi.py", line 33, in <module>
    for item in shared_array:
  File "<string>", line 2, in __getitem__
  File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/managers.py", line 755, in _callmethod
    self._connect()
  File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/managers.py", line 742, in _connect
    conn = self._Client(self._token.address, authkey=self._authkey)
  File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/connection.py", line 169, in Client
    c = SocketClient(address)
  File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/multiprocessing/connection.py", line 293, in SocketClient
    s.connect(address)
  File "/usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 224, in meth
    return getattr(self._sock,name)(*args)
socket.error: [Errno 2] No such file or directory

(Aquí hay otro enfoque utilizando unamultiprocessing.Lock con afecto similar ...esencia) Preguntas similares: