``` import threading import time g_number = 0 def worker1(lock): global g_number for i in range(1000000): # 嘗試獲取并且加鎖　如果沒有被鎖定　就可以被我鎖定；　 # 如果已經被鎖定　阻塞等待　直到成功獲取并且鎖定　 lock.acquire() g_number += 1 # 釋放鎖資源　解鎖　　未鎖定　－－－－> 未鎖定狀態 lock.release() # print(g_number) def worker2(lock): global g_number for i in range(1000000): lock.acquire() g_number += 1 lock.release() # time.sleep(1) if __name__ == '__main__': # 創建一把全局互斥鎖 lock = threading.Lock() # target指定線程在執行時　的函數　　 # ａｒｇｓ指定這個函數在執行時　所需的參數構成元組　一個元素的元祖需要在元素后加上, thd1 = threading.Thread(target=worker1, args=(lock,)) thd1.start() thd2 = threading.Thread(target=worker2, args=(lock,)) thd2.start() thd1.join() thd2.join() print("比賽的結果是%d" % g_number) # 多個線程同時修改同一個數據　會引起異常 ```