Python多线程-计划队列

Question

I don't know why I'm having such a problem with this, basically, I want to have a Queue that is constantly running during the program called "Worker" this then works, however, every 10 seconds or so.. Another method called "Process" comes in and processes the data. Let's assume the following, data is captured every 10 seconds.. (0, 1, 2, 3, ..... n) and then the "Proces" function receives this, processes the data, ends, and then the "Worker" goes back to work and does their job until the program has ended.

I have the following code:

import multiprocessing as mp
import time

DELAY_SIZE = 10

def Worker(q):
    print "I'm working..."

def Process(q): 
    print "I'm processing.."

queue = mp.Queue(maxsize=DELAY_SIZE)
p = mp.Process(target=Worker, args=(queue,))

p.start()

while True:
  d = queue.get()
  time.sleep(10)
  Process()

In this example, it would look like the following:

I'm working...
I'm working...
I'm working...
...
...
...
I'm working...

I'm processing...
I'm processing...
I'm processing...
...
...

I'm working..
I'm working..

Any ideas?

Answer 1

Here is an alternative way using threads:

import threading
import Queue
import time

class Worker(threading.Thread):
  def __init__(self, q):
    threading.Thread.__init__(self)

    self._q = q

  def run(self):
    # here, worker does its job
    # results are pushed to the shared queue
    while True:
      print 'I am working'
      time.sleep(1)
      result = time.time() # just an example
      self._q.put(result)

def process(q):
  while True:
    if q.empty():
      time.sleep(10)
    print 'I am processing'
    worker_result = q.get()
    # do whatever you want with the result...
    print "  ", worker_result

if __name__ == '__main__':
   shared_queue = Queue.Queue()
   worker = Worker(shared_queue)
   worker.start()
   process(shared_queue)