1 #!/usr/bin/env python
 2 import threading
 3 # event.wait()##阻断线程向下执行 event_obj.set()#释放进程向下执行
 4 def do(event):
 5     print(‘start‘)
 6     event.wait()##阻断线程向下执行
 7     print(‘execute‘)
 8 
 9 event_obj = threading.Event()
10 for i in range(10):
11     t = threading.Thread(target=do, args=(event_obj,))
12     t.start()
13 event_obj.clear()
14 inp = input(‘input:‘)
15 if inp == ‘true‘:
16     event_obj.set()#释放线程向下执行