Is there a way to make python subprocess not terminate after running through the script once?

Consider the following 2 files

script_to_start_other_script.py

import schedule

import time

import subprocess 



def run_again():

    subprocess.call(["bash", "-c", "" + "  nohup python script_to_be_started.py > /dev/null 2>&1&"])  





if __name__== "__main__":



    schedule.every(5).seconds.do(run_again)



    while True:

        schedule.run_pending()

        time.sleep(1)

        pass

script_to_be_started.py

import logging

from logging.handlers import TimedRotatingFileHandler



# Init logger

logger = logging.getLogger('test_log')

hdlr = logging.handlers.TimedRotatingFileHandler('./test_log.log', when='h', interval=10)

formatter = logging.Formatter('%(asctime)s %(levelname)s : %(message)s')

hdlr.setFormatter(formatter)

logger.addHandler(hdlr)

logger.setLevel(logging.INFO)

logger.info('Beginning of test_log.py')



import schedule



def run_again():

    logger.info('I am being called')



if __name__== "__main__":

    schedule.every(5).seconds.do(run_again)



    while True:

        logger.info('how many time am I being called')  

        schedule.run_pending()

        time.sleep(1)

        pass

Whenever I run script_to_start_other_script.py , script_to_be_started.py will only run the entire script once

logger.info('how many time am I being called')

will only print once even though there is a while loop. Is there a way for the script to keep running?

edited Dec 31 '18 at 21:46

asked Dec 31 '18 at 21:08

J L

497

How are you reading the output of your spawned processes?

– Blender
Dec 31 '18 at 21:35

I use the logger from import logging

– J L
Dec 31 '18 at 21:37

Even after adding the missing imports and initializing a logger, your code produces no output. Can you edit your two scripts so that they actually run and reproduce your problem?

– Blender
Dec 31 '18 at 21:41

yeah let me give you the full script

– J L
Dec 31 '18 at 21:45

add a comment |

Consider the following 2 files

script_to_start_other_script.py

import schedule

import time

import subprocess 



def run_again():

    subprocess.call(["bash", "-c", "" + "  nohup python script_to_be_started.py > /dev/null 2>&1&"])  





if __name__== "__main__":



    schedule.every(5).seconds.do(run_again)



    while True:

        schedule.run_pending()

        time.sleep(1)

        pass

script_to_be_started.py

import logging

from logging.handlers import TimedRotatingFileHandler



# Init logger

logger = logging.getLogger('test_log')

hdlr = logging.handlers.TimedRotatingFileHandler('./test_log.log', when='h', interval=10)

formatter = logging.Formatter('%(asctime)s %(levelname)s : %(message)s')

hdlr.setFormatter(formatter)

logger.addHandler(hdlr)

logger.setLevel(logging.INFO)

logger.info('Beginning of test_log.py')



import schedule



def run_again():

    logger.info('I am being called')



if __name__== "__main__":

    schedule.every(5).seconds.do(run_again)



    while True:

        logger.info('how many time am I being called')  

        schedule.run_pending()

        time.sleep(1)

        pass

Whenever I run script_to_start_other_script.py , script_to_be_started.py will only run the entire script once

logger.info('how many time am I being called')

will only print once even though there is a while loop. Is there a way for the script to keep running?

edited Dec 31 '18 at 21:46

asked Dec 31 '18 at 21:08

J L

497

How are you reading the output of your spawned processes?

– Blender
Dec 31 '18 at 21:35

I use the logger from import logging

– J L
Dec 31 '18 at 21:37

Even after adding the missing imports and initializing a logger, your code produces no output. Can you edit your two scripts so that they actually run and reproduce your problem?

– Blender
Dec 31 '18 at 21:41

yeah let me give you the full script

– J L
Dec 31 '18 at 21:45

add a comment |

Consider the following 2 files

script_to_start_other_script.py

import schedule

import time

import subprocess 



def run_again():

    subprocess.call(["bash", "-c", "" + "  nohup python script_to_be_started.py > /dev/null 2>&1&"])  





if __name__== "__main__":



    schedule.every(5).seconds.do(run_again)



    while True:

        schedule.run_pending()

        time.sleep(1)

        pass

script_to_be_started.py

import logging

from logging.handlers import TimedRotatingFileHandler



# Init logger

logger = logging.getLogger('test_log')

hdlr = logging.handlers.TimedRotatingFileHandler('./test_log.log', when='h', interval=10)

formatter = logging.Formatter('%(asctime)s %(levelname)s : %(message)s')

hdlr.setFormatter(formatter)

logger.addHandler(hdlr)

logger.setLevel(logging.INFO)

logger.info('Beginning of test_log.py')



import schedule



def run_again():

    logger.info('I am being called')



if __name__== "__main__":

    schedule.every(5).seconds.do(run_again)



    while True:

        logger.info('how many time am I being called')  

        schedule.run_pending()

        time.sleep(1)

        pass

Whenever I run script_to_start_other_script.py , script_to_be_started.py will only run the entire script once

logger.info('how many time am I being called')

will only print once even though there is a while loop. Is there a way for the script to keep running?

edited Dec 31 '18 at 21:46

asked Dec 31 '18 at 21:08

J L

497

Consider the following 2 files

script_to_start_other_script.py

import schedule

import time

import subprocess 



def run_again():

    subprocess.call(["bash", "-c", "" + "  nohup python script_to_be_started.py > /dev/null 2>&1&"])  





if __name__== "__main__":



    schedule.every(5).seconds.do(run_again)



    while True:

        schedule.run_pending()

        time.sleep(1)

        pass

script_to_be_started.py

import logging

from logging.handlers import TimedRotatingFileHandler



# Init logger

logger = logging.getLogger('test_log')

hdlr = logging.handlers.TimedRotatingFileHandler('./test_log.log', when='h', interval=10)

formatter = logging.Formatter('%(asctime)s %(levelname)s : %(message)s')

hdlr.setFormatter(formatter)

logger.addHandler(hdlr)

logger.setLevel(logging.INFO)

logger.info('Beginning of test_log.py')



import schedule



def run_again():

    logger.info('I am being called')



if __name__== "__main__":

    schedule.every(5).seconds.do(run_again)



    while True:

        logger.info('how many time am I being called')  

        schedule.run_pending()

        time.sleep(1)

        pass

Whenever I run script_to_start_other_script.py , script_to_be_started.py will only run the entire script once

logger.info('how many time am I being called')

will only print once even though there is a while loop. Is there a way for the script to keep running?

python subprocess

edited Dec 31 '18 at 21:46

asked Dec 31 '18 at 21:08

J L

497

edited Dec 31 '18 at 21:46

asked Dec 31 '18 at 21:08

J L

497

edited Dec 31 '18 at 21:46

asked Dec 31 '18 at 21:08

J L

497

asked Dec 31 '18 at 21:08

J L

497

asked Dec 31 '18 at 21:08

J L

497

How are you reading the output of your spawned processes?

– Blender
Dec 31 '18 at 21:35

I use the logger from import logging

– J L
Dec 31 '18 at 21:37

Even after adding the missing imports and initializing a logger, your code produces no output. Can you edit your two scripts so that they actually run and reproduce your problem?

– Blender
Dec 31 '18 at 21:41

yeah let me give you the full script

– J L
Dec 31 '18 at 21:45

add a comment |

How are you reading the output of your spawned processes?

– Blender
Dec 31 '18 at 21:35

I use the logger from import logging

– J L
Dec 31 '18 at 21:37

Even after adding the missing imports and initializing a logger, your code produces no output. Can you edit your two scripts so that they actually run and reproduce your problem?

– Blender
Dec 31 '18 at 21:41

yeah let me give you the full script

– J L
Dec 31 '18 at 21:45

How are you reading the output of your spawned processes?

– Blender
Dec 31 '18 at 21:35

I use the logger from import logging

– J L
Dec 31 '18 at 21:37

Even after adding the missing imports and initializing a logger, your code produces no output. Can you edit your two scripts so that they actually run and reproduce your problem?

– Blender
Dec 31 '18 at 21:41

yeah let me give you the full script

– J L
Dec 31 '18 at 21:45

add a comment |

1 Answer
1

active

oldest

votes

I tried you first script and it continuously ran the second one. Try to just run the script_to_be_started.py and make sure that it runs fine. One reason that the second script ran until the log statement might be the missing import for time.

import time

So, after printing the log message, the second script will silently crash because of missing import.

I am assuming you only stripped down the logging stuff but the missing import for time is actually part of your code.

answered Dec 31 '18 at 21:43

faisal

1836

yup missing import time is the problem, thanks

– J L
Dec 31 '18 at 21:48

add a comment |

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1 Answer
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1 Answer
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oldest

votes

import time

So, after printing the log message, the second script will silently crash because of missing import.

I am assuming you only stripped down the logging stuff but the missing import for time is actually part of your code.

answered Dec 31 '18 at 21:43

faisal

1836

yup missing import time is the problem, thanks

– J L
Dec 31 '18 at 21:48

add a comment |

import time

So, after printing the log message, the second script will silently crash because of missing import.

I am assuming you only stripped down the logging stuff but the missing import for time is actually part of your code.

answered Dec 31 '18 at 21:43

faisal

1836

yup missing import time is the problem, thanks

– J L
Dec 31 '18 at 21:48

add a comment |

import time

So, after printing the log message, the second script will silently crash because of missing import.

I am assuming you only stripped down the logging stuff but the missing import for time is actually part of your code.

answered Dec 31 '18 at 21:43

faisal

1836

import time

So, after printing the log message, the second script will silently crash because of missing import.

I am assuming you only stripped down the logging stuff but the missing import for time is actually part of your code.

answered Dec 31 '18 at 21:43

faisal

1836

answered Dec 31 '18 at 21:43

faisal

1836

answered Dec 31 '18 at 21:43

faisal

1836

answered Dec 31 '18 at 21:43

faisal

1836

yup missing import time is the problem, thanks

– J L
Dec 31 '18 at 21:48

add a comment |

yup missing import time is the problem, thanks

– J L
Dec 31 '18 at 21:48

yup missing import time is the problem, thanks

– J L
Dec 31 '18 at 21:48

add a comment |

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