Scheduling Python Script to run every hour accurately

Question

Before I ask, Cron Jobs and Task Scheduler will be my last options, this script will be used across Windows and Linux and I'd prefer to have a coded out method of doing this than leaving this to the end user to complete.

Is there a library for Python that I can use to schedule tasks? I will need to run a function once every hour, however, over time if I run a script once every hour and use .sleep, "once every hour" will run at a different part of the hour from the previous day due to the delay inherent to executing/running the script and/or function.

What is the best way to schedule a function to run at a specific time of day (more than once) without using a Cron Job or scheduling it with Task Scheduler?

Or if this is not possible, I would like your input as well.

AP Scheduler fit my needs exactly.

Version < 3.0

import datetime import time from apscheduler.scheduler import Scheduler  # Start the scheduler sched = Scheduler() sched.daemonic = False sched.start()  def job_function():     print("Hello World")     print(datetime.datetime.now())     time.sleep(20)  # Schedules job_function to be run once each minute sched.add_cron_job(job_function,  minute='0-59') 

out:

>Hello World >2014-03-28 09:44:00.016.492 >Hello World >2014-03-28 09:45:00.0.14110 

Version > 3.0

(From Animesh Pandey's answer below)

from apscheduler.schedulers.blocking import BlockingScheduler  sched = BlockingScheduler()  @sched.scheduled_job('interval', seconds=10) def timed_job():     print('This job is run every 10 seconds.')  @sched.scheduled_job('cron', day_of_week='mon-fri', hour=10) def scheduled_job():     print('This job is run every weekday at 10am.')  sched.configure(options_from_ini_file) sched.start() 

Answer 1

Maybe this can help: Advanced Python Scheduler

Here's a small piece of code from their documentation:

from apscheduler.schedulers.blocking import BlockingScheduler  def some_job():     print "Decorated job"  scheduler = BlockingScheduler() scheduler.add_job(some_job, 'interval', hours=1) scheduler.start() 

Answer 2

To run something every 10 minutes past the hour.

from datetime import datetime, timedelta  while 1:     print 'Run something..'      dt = datetime.now() + timedelta(hours=1)     dt = dt.replace(minute=10)      while datetime.now() < dt:         time.sleep(1)