python3 Timer 内存泄漏

Question

发现我如下使用Timer会出现内存泄漏，程序运行起来，内存使用量快速增加，不会减少。这段代码在tkinter界面中，若用tkinter.after将Timer替换，内存泄漏就不存在了。如何使用Timer才是正确的姿势？谢谢！

from threading import Timer, Thread
from queue import Queue
import time

def opWork():
    while True:
        if not opQueue.empty():
            opQueue.get()
            print(" -------------- pocess a cmd!")
        else:
            time.sleep(0.001)

def tickOff():
    opQueue.put("cmd")
    global tick
    tick.cancel()
    tick = Timer(0.001, tickOff)      
    tick.start()
    print("add a cmd! -------------- ")

tick = Timer(0.001, tickOff)  

if __name__ == "__main__":
    opQueue = Queue()

    worker = Thread(target=opWork)
    worker.start()

    tick.start()

---

---

是python本身的bug吗？刚找到这个 [issue43050] threading timer memory leak

问题代码如下：

While True:
    timer = threading.Timer(5, None)
    timer.start()
    timer.cancel()

我试了，内存快速增加，不会减少。

Answer 1

def tickOff():
    opQueue.put("cmd")
    global tick
    tick.cancel()
    tick = Timer(0.001, tickOff)      
    tick.start()
    print("add a cmd! -------------- ")

tick = Timer(0.001, tickOff) 自己在调自己 无限递归

from threading import Timer, Thread
from queue import Queue
import time

def opWork():
    while True:
        if not opQueue.empty():
            opQueue.get()
            print(" -------------- pocess a cmd!")
        else:
            time.sleep(0.001)

def tickOff():
    opQueue.put("cmd")

if __name__ == "__main__":
    opQueue = Queue()

    worker = Thread(target=opWork)
    worker.start()

    while 1:
      tickOff()
      time.sleep(1)