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Run a program on a specific time using python

I want to run a batch file(say wanted to run calculator) on a specific date and time using python (but don't use the default scheduler).
My program:
a = "C:\Windows\system32\calc.exe"
mybat = open(r"D:\Cyber_security\Python\cal.bat", "w+")
mybat.write(a)
mybat.close()
import datetime
start = datetime.datetime.now()
end = datetime.datetime(2022, 7, 12, 17, 29, 10)
while(True):
if(end - start == 0):
import subprocess
subprocess.call([r"D:\Cyber_security\Python\cal.bat"])
when I run it it doesn't show error but the batch file is not running at specific time. where is the wrong?

Ever tried schedule package?
import schedule
import time
def job():
print("I'm working...")
schedule.every(10).seconds.do(job)
schedule.every(10).minutes.do(job)
schedule.every().hour.do(job)
schedule.every().day.at("10:30").do(job)
schedule.every(5).to(10).minutes.do(job)
schedule.every().monday.do(job)
schedule.every().wednesday.at("13:15").do(job)
schedule.every().minute.at(":17").do(job)
while True:
schedule.run_pending()
time.sleep(1)

What about Rocketry?
from rocketry import Rocketry
app = Rocketry()
#app.task('every 1 hour')
def do_hourly():
...
#app.task('daily between 10:00 and 14:00 & time of week on Monday')
def do_once_a_day_on_monday():
...
#app.task("after task 'do_hourly'")
def do_after_another():
...
if __name__ == "__main__":
app.run()
It also has parametrization, parallelization and Pythonic conditions if you dislike the string-based condition language.
Documentation: https://rocketry.readthedocs.io/
Source code: https://github.com/Miksus/rocketry

I already found my answer.
a = "C:\Windows\system32\calc.exe"
mybat = open(r"D:\Cyber_security\Python\cal.bat", "w+")
mybat.write(a)
mybat.close()
import sched
from datetime import datetime
import time
def action():
import subprocess
subprocess.call([r"D:\Cyber_security\Python\cal.bat"])
s = sched.scheduler(time.time, time.sleep)
e_x = s.enterabs(time.strptime('Tue Jul 12 19:57:17 2022'), 0, action)
s.run()

Use the schedule library to run a job once tomorrow

schedule.wednesday.at("13:15").do(job)
With this code I can run fuction on wednesday 13:15. But I want to make action like, "run function next day morning '10:00' " How can do this?

Wrap job to return schedule.CancelJob such that it runs only once. Then schedule it to run every day at 10:00.
def job_once():
job()
return schedule.CancelJob
schedule.every().day.at('10:00').do(job_once)
Caveat: if the current time is before 10:00, then the job will run this day at 10:00. There's no way to define an initial delay in the schedule library - but we could get the name of the next day and schedule on this day.
import datetime
tomorrow = (datetime.datetime.now() + datetime.timedelta(days=1)).strftime('%A').lower()
getattr(schedule.every(), tomorrow).at('10:00').do(job_once)

Python contains a simple library called sched:
import sched, time
def functionYouWantToRun():
...
s = sched.scheduler(time.localtime, time.sleep)
s.enterabs(time.strptime('[three character day] [three character month] [day of month] [time (hh:mm:ss)] [year]')
s.run()

def job_that_executes_once():
# Do some work that only needs to happen once...
return schedule.CancelJob
if __name__ == "__main__":
from datetime import datetime, timedelta
import schedule
schedule.every().day.at("10:00").do(job_that_executes_once)
I was going to go with time offset, but then realised the above is easier. That will run it the next day.
If you need to run several days in the future, then you are back to datetime offsets:
x=datetime.today()
y = x.replace(day=x.day, hour=10, minute=0, second=0, microsecond=0) +
timedelta(days=1)
yDay = y.strftime('%A')

Run Function at Given DateTime [duplicate]

How can I run a function in Python, at a given time?
For example:
run_it_at(func, '2012-07-17 15:50:00')
and it will run the function func at 2012-07-17 15:50:00.
I tried the sched.scheduler, but it didn't start my function.
import time as time_module
scheduler = sched.scheduler(time_module.time, time_module.sleep)
t = time_module.strptime('2012-07-17 15:50:00', '%Y-%m-%d %H:%M:%S')
t = time_module.mktime(t)
scheduler_e = scheduler.enterabs(t, 1, self.update, ())
What can I do?

Reading the docs from http://docs.python.org/py3k/library/sched.html:
Going from that we need to work out a delay (in seconds)...
from datetime import datetime
now = datetime.now()
Then use datetime.strptime to parse '2012-07-17 15:50:00' (I'll leave the format string to you)
# I'm just creating a datetime in 3 hours... (you'd use output from above)
from datetime import timedelta
run_at = now + timedelta(hours=3)
delay = (run_at - now).total_seconds()
You can then use delay to pass into a threading.Timer instance, eg:
threading.Timer(delay, self.update).start()

Take a look at the Advanced Python Scheduler, APScheduler: http://packages.python.org/APScheduler/index.html
They have an example for just this usecase:
http://packages.python.org/APScheduler/dateschedule.html
from datetime import date
from apscheduler.scheduler import Scheduler
# Start the scheduler
sched = Scheduler()
sched.start()
# Define the function that is to be executed
def my_job(text):
print text
# The job will be executed on November 6th, 2009
exec_date = date(2009, 11, 6)
# Store the job in a variable in case we want to cancel it
job = sched.add_date_job(my_job, exec_date, ['text'])

Might be worth installing this library: https://pypi.python.org/pypi/schedule, basically helps do everything you just described. Here's an example:
import schedule
import time
def job():
print("I'm working...")
schedule.every(10).minutes.do(job)
schedule.every().hour.do(job)
schedule.every().day.at("10:30").do(job)
schedule.every().monday.do(job)
schedule.every().wednesday.at("13:15").do(job)
while True:
schedule.run_pending()
time.sleep(1)

Here's an update to stephenbez' answer for version 3.5 of APScheduler using Python 2.7:
import os, time
from apscheduler.schedulers.background import BackgroundScheduler
from datetime import datetime, timedelta
def tick(text):
print(text + '! The time is: %s' % datetime.now())
scheduler = BackgroundScheduler()
dd = datetime.now() + timedelta(seconds=3)
scheduler.add_job(tick, 'date',run_date=dd, args=['TICK'])
dd = datetime.now() + timedelta(seconds=6)
scheduler.add_job(tick, 'date',run_date=dd, kwargs={'text':'TOCK'})
scheduler.start()
print('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))
try:
# This is here to simulate application activity (which keeps the main thread alive).
while True:
time.sleep(2)
except (KeyboardInterrupt, SystemExit):
# Not strictly necessary if daemonic mode is enabled but should be done if possible
scheduler.shutdown()

I've confirmed the code in the opening post works, just lacking scheduler.run(). Tested and it runs the scheduled event. So that is another valid answer.
>>> import sched
>>> import time as time_module
>>> def myfunc(): print("Working")
...
>>> scheduler = sched.scheduler(time_module.time, time_module.sleep)
>>> t = time_module.strptime('2020-01-11 13:36:00', '%Y-%m-%d %H:%M:%S')
>>> t = time_module.mktime(t)
>>> scheduler_e = scheduler.enterabs(t, 1, myfunc, ())
>>> scheduler.run()
Working
>>>

I ran into the same issue: I could not get absolute time events registered with sched.enterabs to be recognized by sched.run. sched.enter worked for me if I calculated a delay, but is awkward to use since I want jobs to run at specific times of day in particular time zones.
In my case, I found that the issue was that the default timefunc in the sched.scheduler initializer is not time.time (as in the example), but rather is time.monotonic. time.monotonic does not make any sense for "absolute" time schedules as, from the docs, "The reference point of the returned value is undefined, so that only the difference between the results of consecutive calls is valid."
The solution for me was to initialize the scheduler as
scheduler = sched.scheduler(time.time, time.sleep)
It is unclear whether your time_module.time is actually time.time or time.monotonic, but it works fine when I initialize it properly.

dateSTR = datetime.datetime.now().strftime("%H:%M:%S" )
if dateSTR == ("20:32:10"):
#do function
print(dateSTR)
else:
# do something useful till this time
time.sleep(1)
pass
Just looking for a Time of Day / Date event trigger:
as long as the date "string" is tied to an updated "time" string, it works as a simple TOD function. You can extend the string out to a date and time.
whether its lexicographical ordering or chronological order comparison,
as long as the string represents a point in time, the string will too.
someone kindly offered this link:
String Comparison Technique Used by Python

had a really hard time getting these answers to work how i needed it to,
but i got this working and its accurate to .01 seconds
from apscheduler.schedulers.background import BackgroundScheduler
sched = BackgroundScheduler()
sched.start()
def myjob():
print('job 1 done at: ' + str(dt.now())[:-3])
dt = datetime.datetime
Future = dt.now() + datetime.timedelta(milliseconds=2000)
job = sched.add_job(myjob, 'date', run_date=Future)
tested accuracy of timing with this code:
at first i did 2 second and 5 second delay, but wanted to test it with a more accurate measurement so i tried again with 2.55 second delay and 5.55 second delay
dt = datetime.datetime
Future = dt.now() + datetime.timedelta(milliseconds=2550)
Future2 = dt.now() + datetime.timedelta(milliseconds=5550)
def myjob1():
print('job 1 done at: ' + str(dt.now())[:-3])
def myjob2():
print('job 2 done at: ' + str(dt.now())[:-3])
print(' current time: ' + str(dt.now())[:-3])
print(' do job 1 at: ' + str(Future)[:-3] + '''
do job 2 at: ''' + str(Future2)[:-3])
job = sched.add_job(myjob1, 'date', run_date=Future)
job2 = sched.add_job(myjob2, 'date', run_date=Future2)
and got these results:
current time: 2020-12-10 19:50:44.632
do job 1 at: 2020-12-10 19:50:47.182
do job 2 at: 2020-12-10 19:50:50.182
job 1 done at: 2020-12-10 19:50:47.184
job 2 done at: 2020-12-10 19:50:50.183
accurate to .002 of a second with 1 test
but i did run a lot of tests and accuracy ranged from .002 to .011
never going under the 2.55 or 5.55 second delay

#everytime you print action_now it will check your current time and tell you should be done
import datetime
current_time = datetime.datetime.now()
current_time.hour
schedule = {
'8':'prep',
'9':'Note review',
'10':'code',
'11':'15 min teabreak ',
'12':'code',
'13':'Lunch Break',
'14':'Test',
'15':'Talk',
'16':'30 min for code ',
'17':'Free',
'18':'Help ',
'19':'watever',
'20':'watever',
'21':'watever',
'22':'watever'
}
action_now = schedule[str(current_time.hour)]

Sleeping time for running multiple function using python

I am running a program which has many functions that need to be run every day at 00:00. I am using APSchedular and was wondering if there is need of sleeping time to run 10-20 functions exactly at 00:00 every day?
Here is my program;
import time
from apscheduler.schedulers.blocking import BlockingScheduler
sched = BlockingScheduler()
#sched.scheduled_job('cron', day_of_week='mon-sun', hour=0, minute=0)
def ABC():
path1 = ('C:\Users\ABC.tsv')
date = time.strftime("%Y-%m-%d")
url2 = ("%sT00:00:00&to=%sT23:00:00"%(date,date))
data2 = requests.get(url2)
Z=zipfile.ZipFile(StringIO.StringIO(data2.content))
Z.extractall()
df1=pd.read_csv(path1, sep='\t',names = ["Datetime", "BAC"])
df1['Datetime']=pd.to_datetime(df1['Datetime'])
df1=df1.set_index('Datetime')
df1=df1.resample('H',how='sum')
ABC= df1.copy()
ABCD= ABC* 0.519
ABC.to_csv('C:\Users\ABC.tsv')
ABCD.to_csv('C:\Users\ABCD.tsv')
return
sched.start()
Also, APSchedular does not allow adding an argument to the function, is there any workaround to this? Please note: in the above example, I have also added one function.

Python sched scheduler and reboots

I have read about python sched (task scheduler), it works like a cron.
but I have a question :
lets say if I schedule a function to run after every 2 hours and in the mean time my system gets shut down, then I again restart the system...
Does the scheduler automatically start and run the function after 2 hours? Or do I have to start that again after shutting down the system?
Does sched work like a daemon?

Answer to all three questions is No.
sched is different from cron. It takes a generic timer or counter function and a delay function and lets you to schedule a function call after a particular time (an event as defined by your generic timer function).
It won't run after you close your program, unless you maintain state by writing to a file or db. This is complicated and using cron would be better.
sched works on events, but not on background. so, it not is not exactly a deamon, but you can deamonize it running the program in the background using OS facilities.

and if this is so :
will this also work even after system restart?
answer is : NO then how can turbogear scheduler can run using cronos in cron? scheduled events in turbogear will also be vanished after SYSTEM restart.
PLEASE CORRECT ME IF I AM WRONG.
import time
import sched
import datetime
import threading
import calendar
#from datetime import datetime
class test:
def __init__(self):
self.name = ''
def getSec(self):
now = datetime.datetime.now()
print "now - ", now
currentYear = now.year
currentMonth = now.month
currentDay = now.day
currentHour = now.hour
currentMinute = now.minute
currentSecond = now.second
currentMicroseconds = now.microsecond
command = "python runbackup.py"
print "command is - ", command
print "currentMinute - ", currentMinute
print "currentSecond - ", currentSecond
# current time
a = datetime.datetime(currentYear, currentMonth, currentDay, currentHour, currentMinute, currentSecond, currentMicroseconds)
last_date_of_current_month = calendar.monthrange(currentYear, currentMonth)[1]
print "last_date_of_current_month - ", last_date_of_current_month
b = datetime.datetime(currentYear, currentMonth, int(last_date_of_current_month), 23, 59, 59, 000000)
#b = datetime.datetime(currentYear, currentMonth, int(29), 18, 29, 00, 000000)
#print "date time of b is - %s %s " % (18, 29)
c = b-a
print "c is - ", c
time.sleep(1)
scheduler = sched.scheduler(time.time, time.sleep)
#scheduler.cancel(e1)
sec = c.seconds
print "second - ", sec
print "scheduler entered."
e1 = scheduler.enter(sec, 1, self.getSec, ())
t = threading.Thread(target=scheduler.run)
print "thread started."
print "======================================"
t.start()
#scheduler.cancel(e1)
#print "canceled."
return True
if __name__=='__main__' :
obj = test()
obj.getSec()