介绍
闲来无事整理下python关于多线程相关的知识点，对于thread模块只是用于介绍多线程，真正开发时建议使用更高级别的threading模块。
代码
import _thread as thread
from time import sleep,ctime
loops = [4,2]
def loop(nloop,nsec,lock):
print('start loop ',nloop,' at:',ctime())
sleep(nsec)
print('loop ',nloop,' done at:',ctime())
lock.release()
def main():
print('starting at:',ctime())
locks = []
nloops = range(len(loops))
for i in nloops:
lock = thread.allocate_lock()# 分配锁对象
lock.acquire() # 尝试获取锁对象(把锁锁上)
locks.append(lock)# 添加到锁列表中
for i in nloops:# 派生线程
# 调用loop()函数，传递循环号，睡眠时间以及用于该线程的锁
thread.start_new_thread(loop,(i,loops[i],locks[i]))
# 思考：为啥不在上锁的循环中启动线程
for i in nloops:# 直到所有锁都被释放之后才会继续执行
while locks[i].locked():pass
print('all DONE at:',ctime())
if __name__ == "__main__":
main()
结果
starting at: Tue Sep 8 15:17:04 2020
start loop 1 at: Tue Sep 8 15:17:04 2020
start loop 0 at: Tue Sep 8 15:17:04 2020
loop 1 done at: Tue Sep 8 15:17:06 2020
loop 0 done at: Tue Sep 8 15:17:08 2020
all DONE at: Tue Sep 8 15:17:08 2020
