obs-timer-linux

timer.py

from datetime import datetime, timedelta
import time
import os

setHour = int(input('Hour: '))
setMin = int(input('Minute: '))

setTime = datetime(
    year = datetime.today().year,
    month = datetime.today().month,
    day = datetime.now().day,
    hour = setHour,
    minute = setMin
)

while True: #constantly looping timer because life is stupid
    currentTime = datetime.now()
    diff = setTime - currentTime # time difference
    timeArr = str(diff).split(':')
    
    ftime = f'{timeArr[1]}:{timeArr[2].split(".")[0]}'
    print(ftime)

    with open ('timer.txt', 'w') as f: #opens timer file
        f.seek(0) # goes to beginning of file
        f.write(ftime) # Writes the current time into the file
        f.truncate() # Cuts off the file
    
    time.sleep(1) #sleeps 1s until next update so we don't need threading

    if (ftime) == '00:00': #kill the program if the timer reaches 0
        exit()