python 多线程和多进程的区别 mutiprocessing theading

 1 #!/usr/bin/python
 2 # -*- coding:utf-8 -*-
 3 import os
 4 import threading
 5 import multiprocessing
 6 count_thread = 0
 7 count_process = 0
 8 
 9 # worker function
10 def worker1(sign, lock):
11     global count_thread
12     lock.acquire()
13     count_thread += 1
14     print(sign, os.getpid())
15     lock.release()
16 
17 def worker2(sign, lock):
18     global count_process
19     lock.acquire()
20     count_process += 1
21     print(sign, os.getpid())
22     lock.release()
23 # Main
24 print(‘Main:‘,os.getpid())
25 
26 # Multi-thread
27 record = []
28 lock  = threading.Lock()
29 for i in range(5):
30     thread = threading.Thread(target=worker1,args=(‘thread‘,lock))
31     thread.start()
32     record.append(thread)
33 
34 for thread in record:
35     thread.join()
36 
37 # Multi-process
38 record = []
39 lock = multiprocessing.Lock()
40 for i in range(5):
41     process = multiprocessing.Process(target=worker2,args=(‘process‘,lock))
42     process.start()
43     record.append(process)
44 
45 for process in record:
46     process.join()
47 
48 
49 print count_thread
50 print count_process