所有子线程都会进行阻塞操作，导致最后的改变只是改了一次

from threading import Thread
import time

money = 100

def task():
global money

# 模拟获取到车票信息
temp = money

# 模拟网络延迟
time.sleep(2)

# 模拟购票
money = temp - 1

def main():
task_list = [Thread(target=work) for i in range(100)]
[task.start() for task in task_list]
[task.join() for task in task_list]

# 所有子线程结束后打印 money
print(money)

if name == 'main':
main()

# 99

【二】解决办法
在数据发生变化的地方进行加锁处理

from threading import Thread, Lock
import time

money = 100

生成锁

mutex = Lock()

def work():
global money

# 数据发生改变之前加锁
mutex.acquire()

# 模拟获取到车票信息
temp = money

# 模拟网络延迟
time.sleep(0.6)

# 模拟购票
money = temp - 1

# 数据发生改变后解锁
mutex.release()

def main():
task_list = [Thread(target=work) for i in range(100)]
[task.start() for task in task_list]
[task.join() for task in task_list]

# 所有子线程结束后打印 money
print(money)

if name == 'main':
main()

# 0