如何同步python线程？

Question

我想两个线程同步：一个追加，另外空间PoPing从列表：

import threading 


class Pop(threading.Thread): 
    def __init__(self, name, alist): 
     threading.Thread.__init__(self) 
     self.alist = alist 
     self.name = name 

    def run(self): 
     print "Starting " + self.name 
     self.pop_from_alist(self.alist) 
     print "Exiting " + self.name 

    def pop_from_alist(self, alist): 
     alist.pop(0) 


def main(): 
    alist = [1, 2] 
    # Create new thread 
    thread = Pop("Pop thread", alist) 
    for x in range(2): 
     alist.append(alist[-1]+1) 
    thread.start() 
    print "Exiting Main Thread" 
    print alist 
main() 

我怎样才能做到这一点，我应该用锁或使用的连接方法？ 无法找到任何初学者的同步教程

Answer 1

两个线程需要共享相同的锁。这样他们就会知道其他线程何时锁定它。你需要在你的主线程来定义锁并将它传递给你的线程上初始化：

# Create a lock 
lock = threading.Lock() 

# Create new threads 
thread1 = Append("Append thread", alist, lock) 
thread2 = Pop("Pop thread", alist, lock) 

# Start new Threads 
thread1.start() 
thread2.start() 

你可以处理它的线程在你已经做的方式，但跳过锁创建：

class Append(threading.Thread): 
    def __init__(self, name, alist, lock): 
     threading.Thread.__init__(self) 
     self.alist = alist 
     self.name = name 
     self.lock = lock 

def append_to_list(self, alist, counter): 
    while counter: 
     with self.lock: 
      alist.append(alist[-1]+1) 
      counter -= 1