Python中尝试多线程编程的一个简明例子

import time,datetime
import threading
 
def worker(a_tid,a_account):
 global g_mutex
 print("Str " , a_tid, datetime.datetime.now() )
 for i in range(1000000):
  #g_mutex.acquire()
  a_account.deposite(1)
  #g_mutex.release()
 print("End " , a_tid , datetime.datetime.now() )
  
class Account:
 def __init__ (self, a_base ):
  self.m_amount=a_base
 def deposite(self,a_amount):
  self.m_amount+=a_amount
 def withdraw(self,a_amount):
  self.m_amount-=a_amount 
 
if __name__ == "__main__":
 global g_mutex
 count = 0
 dstart = datetime.datetime.now()
 print("Main Thread Start At: ", dstart)
 #init thread_pool
 thread_pool = []
 #init mutex
 g_mutex = threading.Lock()
 # init thread items
 acc = Account(100)
 for i in range(10):
  th = threading.Thread(target=worker,args=(i,acc) ) ;
  thread_pool.append(th)
   
 # start threads one by one  
 for i in range(10):
  thread_pool[i].start()
  
 #collect all threads
 for i in range(10):
  threading.Thread.join(thread_pool[i])
 dend = datetime.datetime.now()
 print("count=", acc.m_amount)
 print("Main Thread End at: ", dend, " time span ", dend-dstart)