Thread Mutex lock

#!/usr/bin/env python
# Encoding:utf-8
# DATE:2018/6/18
From threading import Thread, Lock
Import time

n = 100


Def task ():
Global n
Mutex.acquire () # Prevent 99 other threads from waiting here to ensure data security
TEMP = n
Time.sleep (0.1) # Start a thread, sleep 0.1 seconds enough for 100 threads to start all
n = temp-1 # 100 Threads all modified to 99
Mutex.release ()


if __name__ = = ' __main__ ':
Mutex = Lock ()
t_l = []
time1 = Time.time ()
For I in range (100): # 100 threads opened within a process
t = Thread (Target=task)
T_l.append (t)
T.start ()

For I in t_l:
T.join () # Ensure that the main thread is finished executing
Time2 = Time.time ()
Time3 = time2-time1
Print (' master ', N, time3) # Master 0 10.06277322769165

Thread Mutex lock