多线程

Posted 2020-12-05 zhuxiang1633

1.threading

　　查看当前线程

　　开启新的线程

import threading

def worker():
    print(‘new thread..‘)
    print(threading.current_thread().getName()) 

if __name__ == ‘__main__‘:
    print(‘hello‘)
    t = threading.current_thread()
    print(t.getName())  # MainThread
    th1 = threading.Thread(target=worker, name=‘my Thread‘)
    th1.start()

 

 

2.锁

　　细粒度锁：主动加的锁

　　粗粒度锁：解释器加的锁 GIL