如何在python多线程中使用锁？

# 锁
import time
from threading import Thread
from threading import Lock
 
def func():
    global n
    lock.acquire()
    temp = n  # 从进程中获取n
    time.sleep(0.01)
    n = temp-1  # 得到结果再存储回进程
    lock.release()
n = 100
lock = Lock()
t_lis = []
for i in range(100):
    t = Thread(target=func)
    t.start()
    t_lis.append(t)
[t.join() for t in t_lis]
print(n)