Multi-process and multi-thread examples in Python (2) Programming methods

 1 #!/usr/bin/python 2 # -*- coding: utf-8 -* 3 author = 'zni.feng' 4 import  sys 5 reload (sys) 6 sys.setdefaultencoding('utf-8') 7  8 import threading, time 9 10 def test(index):11     print time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))12     print 'thread %s starts.' % threading.current_thread().name13     print 'the index is %d' % index14     time.sleep(3)15     print time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))16     print 'thread %s ends.' % threading.current_thread().name17 18 if name == "main":19     print time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))20     print 'thread %s starts.' % threading.current_thread().name21     #创建线程22     my_thread = threading.Thread(target = test, args=(1,) , name= 'zni_feng_thread')23     #等待2s24     time.sleep(2)25     #启动线程26     my_thread.start()27     #等待线程结束28     my_thread.join()29     print time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))30     print 'thread %s ends.' % threading.current_thread().name

2017-01-12 22:06:32
thread MainThread starts.
2017-01-12 22:06:34
thread zni_feng_thread starts.
the index is 1
2017-01-12 22:06:37
thread zni_feng_thread ends.
2017-01-12 22:06:37
thread MainThread ends.
[Finished in 5.1s]

 1 #!/usr/bin/python 2 # -*- coding: utf-8 -* 3 author = 'zni.feng' 4 import  sys 5 reload (sys) 6 sys.setdefaultencoding('utf-8') 7 import threading 8  9 class Account:10     def init(self):11         self.balance = 012 13     def add(self):14         for i in range(0,100000):15             self.balance += 116 17     def delete(self):18         for i in range(0,100000):19             self.balance -=1 
20 21 if name == "main":22     account  = Account()23     #创建线程24     thread_add = threading.Thread(target=account.add, name= 'Add')25     thread_delete = threading.Thread(target=account.delete, name= 'Delete')26 27     #启动线程28     thread_add.start()29     thread_delete.start()30     31     #等待线程结束32     thread_add.join()33     thread_delete.join()34 35     print 'The final balance is: ' + str(account.balance)

The final balance is: -51713
[Finished in 0.1s]

 1 #!/usr/bin/python 2 # -*- coding: utf-8 -* 3 author = 'zni.feng' 4 import  sys 5 reload (sys) 6 sys.setdefaultencoding('utf-8') 7 import threading 8  9 class Account:10     def init(self):11         self.balance = 012 13     def add(self, lock):14         #获得锁15         lock.acquire()16         for i in range(0,100000):17             self.balance += 118         #释放锁19         lock.release()20 21     def delete(self, lock):22         #获得锁23         lock.acquire()24         for i in range(0,100000):25             self.balance -=1 
26         #释放锁27         lock.release()28 29 30 if name == "main":31     account  = Account()32     lock = threading.Lock()33     #创建线程34     thread_add = threading.Thread(target=account.add, args=(lock, ), name= 'Add')35     thread_delete = threading.Thread(target=account.delete, args=(lock, ), name= 'Delete')36 37     #启动线程38     thread_add.start()39     thread_delete.start()40     41     #等待线程结束42     thread_add.join()43     thread_delete.join()44 45     print 'The final balance is: ' + str(account.balance)

The final balance is: 0
[Finished in 0.1s]