How To Keep Python Script Running In Background

Let usa see how to run a Python programme or project in the background i.eastward. the program volition beginning running from the moment device is on and stop at shut down or when you lot close it. Just run one time to assure the program is fault-bug gratis

One way is to utilise pythonw, pythonw is the concatenation of python+without terminal window, i.east. run python without final window. You can use it past running the following line on the final:

pythonw <nameOfFile.py>

Hither's the background.py is the file:

In Linux and mac, for running py files in the background yous merely need to add & sign afterwards using command it will tell the interpreter to run the program in the background

python filename.py &

It will run the programme in the groundwork as well simultaneously you lot can use a terminal. At that place volition procedure id for the background process, if you lot desire yous can kill procedure also past using as you can't just kill it past CTRL+C , To kill it, open up another final session and use the command

kill -9 {{id got later }} &

impale is abbreviated for killing procedure while -nine used to tell to kill it immediately, the corresponding status volition be updated. In order to become your output, you can flush it up in a file by using

python filename.py > filenameToFlush &

It will exist generating output i.e. flushing output in the file simply it'southward updated in the buffer memory, yous accept to wait for the termination of the program to reverberate output in a hard disk drive file. To resolve this, y'all merely need to tell python interpreter that don't use buffered memory steps:

Stop/impale currently running the file

Now use utility

python -u filename.py > FileToFlush &

It volition direct put the output in the file y'all have selected.

If you close concluding before the end of the program, all processes executed by the final volition terminate, A hangup state of affairs is arising in order to counter problem you need to employ nohup command as shown beneath nohup will assure that procedure is running till the end whether you close parent final. nohup stands for no hangup

nohup python -u filename.py

Now you don't demand to affluent output in whatsoever file as nohup utility generates a file named nohup.out while executing. Information technology will be similar log file. The name of the output fill generated past nohup will reverberate on. To stop this execution you will need ID process, There is no trouble if y'all can remember or if you tin can't, you need to search for file But utilize post-obit command