Python 相当于 Java 的 `tryLock`(惯用语)？

Question

Java tryLock(long time, TimeUnit unit)可以用作获取锁的非阻塞尝试。如何实现python中的等价物？ (首选 Pythonic | idiomatic 方式!)

Java 尝试锁:

ReentrantLock lock1 = new ReentrantLock()
if (lock1.tryLock(13, TimeUnit.SECONDS)) { ... }

Python 锁:

import threading
lock = Lock()
lock.acquire() # how to lock.acquire(timeout = 13) ?

Answer 1

可以使用 threading 模块的 Lock.acquire(False) 获得“try lock”行为(参见 Python doc):

import threading
import time

my_lock = threading.Lock()
successfully_acquired = my_lock.acquire(False)
if successfully_acquired:
    try:
        print "Successfully locked, do something"
        time.sleep(1)
    finally:
        my_lock.release()
else:
    print "already locked, exit"

我想不出一个令人满意的方法来在这里使用 with。