Stopping a thread after a certain amount of time

Question

I m looking to terminate some threads after a certain amount of time  These threads will be running an infinite while loop and during this time they can stall for a random  large amount of time  The thread cannot last longer than time set by the duration variable  How can I make it so after the length set by duration  the threads stop   def main        t1   threading Thread target thread1  args 1      t2   threading Thread target thread2  args 2       time sleep duration       the threads must be terminated after this sleep

User · Answer

If you want the threads to stop when your program exits (as implied by your example), then make them daemon threads.

If you want your threads to die on command, then you have to do it by hand. There are various methods, but all involve doing a check in your thread's loop to see if it's time to exit (see Nix's example).

User · Answer

This will work if  you are not blocking     If you are planing on doing sleeps  its absolutely imperative that you use the event to do the sleep   If you leverage the event to sleep  if someone tells you to stop while  sleeping  it will wake up   If you use time sleep   your thread will only stop after it wakes up   import threading import time  duration   2  def main        t1 stop   threading Event       t1   threading Thread target thread1  args  1  t1 stop        t2 stop   threading Event       t2   threading Thread target thread2  args  2  t2 stop        time sleep duration        stops thread t2     t2 stop set    def thread1 arg1  stop event       while not stop event is set            stop event wait timeout 5   def thread2 arg1  stop event       while not stop event is set            stop event wait timeout 5

User · Answer

If you want to use a class  from datetime import datetime timedelta  class MyThread          def   init   self  name  timeLimit                   self name   name         self timeLimit   timeLimit     def run self              get the start time         startTime   datetime now                while True               stop if the time limit is reached              if  datetime now  -startTime  gt self timeLimit                  break            print  A    mt   MyThread  aThread  timedelta microseconds 20000   mt run

[python] Stopping a thread after a certain amount of time

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