Issue When Scheduling Tasks Using Clock() Function

Issue with python schedule library

You are currently explicitly calling the getRegressionData function with the argument subredditList and pass the return value to do.

As per the docs, do accepts a function and optional positional and keyword arguments. It then calls the function for you at the desired time with the provided arguments.

Use do(getRegressionData, subredditList).

How to schedule a periodic task that is immune to system time change using Python

From the sched documentation:

class sched.scheduler(timefunc, delayfunc)

The scheduler class defines a generic interface to scheduling events. It needs two functions to actually deal with the “outside
world” — timefunc should be callable without arguments, and return a
number (the “time”, in any units whatsoever). The delayfunc function
should be callable with one argument, compatible with the output of
timefunc, and should delay that many time units. delayfunc will also
be called with the argument 0 after each event is run to allow other
threads an opportunity to run in multi-threaded applications.

The problem you have is that your code uses time.time() as timefunc, whose return value (when called without arguments) is the current system time and is thus affected by re-winding the system clock.

To make your code immune to system time changes you'd need to provide a timefunc which doesn't depend on the system time, start/current timestamps, etc.

You can write your own function, for example one returning the number of seconds since your process is started, which you'd have to actually count in your code (i.e. don't compute it based on timestamp deltas). The time.clock() function might help, if it's based on CPU time counters, but I'm not sure if that's true or not.

Creating an internal clock within Coldfusion .cfc file to execute scheduled tasks

This can actually be done via Scheduled Tasks within Coldfusion Administrator. I didn't know that was a thing before actually making this post. My apologies.

Thank you,

Scheduling Python Script to run every hour accurately

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()

How to schedule a function to run every hour on Flask?

You can use BackgroundScheduler() from APScheduler package (v3.5.3):

import time
import atexit

from apscheduler.schedulers.background import BackgroundScheduler

def print_date_time():
    print(time.strftime("%A, %d. %B %Y %I:%M:%S %p"))

scheduler = BackgroundScheduler()
scheduler.add_job(func=print_date_time, trigger="interval", seconds=60)
scheduler.start()

# Shut down the scheduler when exiting the app
atexit.register(lambda: scheduler.shutdown())

Note that two of these schedulers will be launched when Flask is in debug mode. For more information, check out this question.

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