I want to run my program in jupyter notebook and this program stops at specific time(for example 18:00). I wrote program by while loop and incremental index, but it's better to write it with time parameter.
I run mentioned program for 7 hours each day. It must run nonstop.
while(i<500000):
execute algorithm
i+=1
But I'd like to run my program like bellow:
while(not 18:00 clock):
execute algorithm
You can create a child process that will terminate parent process and itself at certain time:
import multiprocessing as mp
import time
import datetime
import sys
import signal
import os
def process(hr, minute):
while True:
d = datetime.datetime.now()
if d.hour == hr and d.minute == minute:
os.kill(os.getppid(), signal.SIGTERM)
sys.exit()
else:
time.sleep(25)
p = mp.Process(target=process, args=(18, 0))
p.start()
# your program here ...
Use:
import datetime
#create the alarm clock.
alarm = datetime.time(15, 8, 24) #Hour, minute and second you want.
On while:
while alarm < datetime.datetime.now().time():
do something
You could set a specific date too, setting like this:
datetime.datetime(2019, 3, 21, 22, 0, 0) #Year, month, day, hour, minute and second you want.
For more info, check the documentation of datetime.
You could create a function that takes hour and minutes as parameters and to perform a check inside the while loop:
import datetime
def proc(h, m):
while True:
currentHour = datetime.datetime.now().hour
currentMinute = datetime.datetime.now().minute
if currentHour == h and currentMinute == m:
break
# Do stuff...
# Function call.
proc(18,0)
import datetime
https://docs.python.org/3/library/datetime.html
You can then use the various functions (time or timedelta) to set a time.
timeNow = datetime.datetime() print timeNow
You could set this up as a cron job and start the job at time x and stop at time x.
Let us assume you want you code to run 10 pm(22:oo) hour every day. If you are using Linux, you can do something like this to run job as root user
sudo crontab -e
0 22 * * * /path/to/directory/python my_code.py
your python file my_code.py could be something like that
# python code to search pattern in a string using regex
import re
str1 = 'this is {new} string with [special] words.'
r = re.search(r'\{(.*?)\}', str1)
if r:
found =r.group()
else:
"No match found"
print found
