How to run the Python program forever

Question

I need to run my Python program forever in an infinite loop    Currently I am running it like this -      usr bin python  import time    some python code that I want    to keep on running     Is this the right way to run the python program forever    And do I even need this time sleep call  while True      time sleep 5    Is there any better way of doing it  Or do I even need time sleep call  Any thoughts

User · Accepted Answer

Yes  you can use a while True  loop that never breaks to run Python code continually     However  you will need to put the code you want to run continually inside the loop      usr bin python  while True        some python code that I want        to keep on running   Also  time sleep is used to suspend the operation of a script for a period of time   So  since you want yours to run continually  I don t see why you would use it

User · Answer

Here is the complete syntax       usr bin python3  import time   def your function        print  Hello  World    while True      your function       time sleep 10   make function to sleep for 10 seconds

User · Answer

I have a small script interruptableloop py that runs the code at an interval  default 1sec   it pumps out a message to the screen while it s running  and traps an interrupt signal that you can send with CTL-C      usr bin python3 from interruptableLoop import InterruptableLoop  loop InterruptableLoop intervalSecs 1    redundant argument while loop ShouldContinue         some python code that I want       to keep on running    pass   When you run the script and then interrupt it you see this output   the periods pump out on every pass of the loop     py36     interruptexample py CTL-C to stop    or  kill -s SIGINT pid         C Exiting at  2018-07-28 14 58 40 359331   interruptableLoop py           Use to create a permanent loop that can be stopped              from same terminal where process was started and is running in foreground           CTL-C          from same user account but through a different terminal            kill -2  lt pid gt           or   kill -s SIGINT  lt pid gt       import signal import time from datetime import datetime as dtt   all     InterruptableLoop    class InterruptableLoop      def   init   self intervalSecs 1 printStatus True           self intervalSecs intervalSecs         self shouldContinue True         self printStatus printStatus         self interrupted False         if self printStatus              print   CTL-C to stop t or  kill -s SIGINT pid            signal signal signal SIGINT  self  StopRunning          signal signal signal SIGQUIT  self  Abort          signal signal signal SIGTERM  self  Abort       def  StopRunning self  signal  frame           self shouldContinue   False      def  Abort self  signal  frame           raise       def ShouldContinue self           time sleep self intervalSecs          if self shouldContinue and self printStatus               print      end    flush True          elif not self shouldContinue and self printStatus              print   Exiting at   dtt now            return self shouldContinue

User · Answer

I know this is too old thread but why no one mentioned this     usr bin python3 import asyncio   loop   asyncio get event loop   try      loop run forever   finally      loop close

User · Answer

sleep is a good way to avoid overload on the cpu  not sure if it s really clever  but I usually use  while not sleep 5         code to execute   sleep method always returns None

User · Answer

for OS s that support select   import select    your code  select select

User · Answer

How about this one   import signal signal pause     This will let your program sleep until it receives a signal from some other process  or itself  in another thread   letting it know it is time to do something

[python] How to run the Python program forever?

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