不加锁时
同样是上面实例的代码，注释以下两行代码：
threadLock.acquire()
threadLock.release()
输出结果为：
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开始线程: Thread-1开始线程: Thread-2[Thu Nov 22 16:09:20 2018] Thread-1 修改第 12 个值，修改后值为:1[Thu Nov 22 16:09:21 2018] Thread-2 修改第 12 个值，修改后值为:2[Thu Nov 22 16:09:21 2018] Thread-1 修改第 11 个值，修改后值为:1[Thu Nov 22 16:09:22 2018] Thread-1 修改第 10 个值，修改后值为:1[Thu Nov 22 16:09:23 2018] Thread-1 修改第 9 个值，修改后值为:1[Thu Nov 22 16:09:23 2018] Thread-2 修改第 11 个值，修改后值为:2[Thu Nov 22 16:09:24 2018] Thread-1 修改第 8 个值，修改后值为:1[Thu Nov 22 16:09:25 2018] Thread-2 修改第 10 个值，修改后值为:2[Thu Nov 22 16:09:25 2018] Thread-1 修改第 7 个值，修改后值为:1[Thu Nov 22 16:09:26 2018] Thread-1 修改第 6 个值，修改后值为:1[Thu Nov 22 16:09:27 2018] Thread-2 修改第 9 个值，修改后值为:2[Thu Nov 22 16:09:27 2018] Thread-1 修改第 5 个值，修改后值为:1[Thu Nov 22 16:09:28 2018] Thread-1 修改第 4 个值，修改后值为:1[Thu Nov 22 16:09:29 2018] Thread-2 修改第 8 个值，修改后值为:2[Thu Nov 22 16:09:29 2018] Thread-1 修改第 3 个值，修改后值为:1[Thu Nov 22 16:09:30 2018] Thread-1 修改第 2 个值，修改后值为:1[Thu Nov 22 16:09:31 2018] Thread-2 修改第 7 个值，修改后值为:2[Thu Nov 22 16:09:31 2018] Thread-1 修改第 1 个值，修改后值为:1[Thu Nov 22 16:09:33 2018] Thread-2 修改第 6 个值，修改后值为:2[Thu Nov 22 16:09:35 2018] Thread-2 修改第 5 个值，修改后值为:2[Thu Nov 22 16:09:37 2018] Thread-2 修改第 4 个值，修改后值为:2[Thu Nov 22 16:09:39 2018] Thread-2 修改第 3 个值，修改后值为:2[Thu Nov 22 16:09:41 2018] Thread-2 修改第 2 个值，修改后值为:2[Thu Nov 22 16:09:43 2018] Thread-2 修改第 1 个值，修改后值为:2主进程结束！Thread-1 线程结束！Thread-2 线程结束！ |
