How to terminate process from Python using pid

Question

I m trying to write some short script in python which would start another python code in subprocess if is not already started else terminate terminal  amp  app  Linux    So it looks like      usr bin python from subprocess import Popen  text file   open   proc    rb   dat   text file read   text file close    def do dat        text file   open   proc    w       p   None      if dat     x             p   Popen  python StripCore py   shell True          text file write  str  p pid          else           text file write   x             p     Assign process by pid   pid from int  dat           p terminate        text file close    do  dat     Have problem of lacking knowledge to name proces by pid which app reads from file   proc   The other problem is that interpreter says that string named dat is not equal to  x      What I ve missed

User · Answer

I wanted to do the same thing as  but I wanted to do it in the one file   So the logic would be    if a script with my name is running  kill it  then exit if a script with my name is not running  do stuff   I modified the answer by Bakuriu and came up with this   from os import getpid from sys import argv  exit import psutil     pip install psutil  myname   argv 0  mypid   getpid   for process in psutil process iter        if process pid    mypid          for path in process cmdline                if myname in path                  print  process found                  process terminate                   exit       your program starts here      Running the script will do whatever the script does  Running another instance of the script will kill any existing instance of the script   I use this to display a little PyGTK calendar widget which runs when I click the clock  If I click and the calendar is not up  the calendar displays  If the calendar is running and I click the clock  the calendar disappears

User · Answer

Using the awesome psutil library it s pretty simple   p   psutil Process pid  p terminate     or p kill     If you don t want to install a new library  you can use the os module   import os import signal  os kill pid  signal SIGTERM   or signal SIGKILL    See also the os kill documentation     If you are interested in starting the command  python StripCore py if it is not running  and killing it otherwise  you can use psutil to do this reliably   Something like   import psutil from subprocess import Popen  for process in psutil process iter        if process cmdline        python    StripCore py            print  Process found  Terminating it            process terminate           break else      print  Process not found  starting it        Popen   python    StripCore py      Sample run    python test strip py    test strip py contains the code above Process not found  starting it   python test strip py  Process found  Terminating it   python test strip py  Process not found  starting it   killall python  python test strip py  Process not found  starting it   python test strip py  Process found  Terminating it   python test strip py  Process not found  starting it      Note  In previous psutil versions cmdline was an attribute instead of a method

User · Answer

So  not directly related but this is the first question that appears when you try to find how to terminate a process running from a specific folder using Python  It also answers the question in a way even though it is an old one with lots of answers   While creating a faster way to scrape some government sites for data I had an issue where if any of the processes in the pool got stuck they would be skipped but still take up memory from my computer  This is the solution I reached for killing them  if anyone knows a better way to do it please let me know  import pandas as pd import wmi from re import escape import os  def kill process kill path  execs       f   wmi WMI       esc   escape kill path      temp     id       path       name          for process in f Win32 Process            temp  id   append process ProcessId          temp  path   append process ExecutablePath          temp  name   append process Name      temp   pd DataFrame temp      temp   temp dropna subset   path    reset index   drop columns   index        temp   temp loc temp  path   str contains esc   loc temp name isin execs   reset index   drop columns   index         os system  taskkill  PID     f  format t   for t in temp  id

[python] How to terminate process from Python using pid?

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