How to get PID by process name

Question

Is there any way I can get the PID by process name in Python     PID USER      PR  NI  VIRT  RES  SHR S   CPU  MEM    TIME   COMMAND                                                                                          3110 meysam    20   0  971m 286m  63m S  14 0  7 9  14 24 50 chrome    For example I need to get 3110 by chrome

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Complete example based on the excellent  Hackaholic s answer   def get process id name          Return process ids found by  partial  name or regex        gt  gt  gt  get process id  kthreadd        2       gt  gt  gt  get process id  watchdog        10  11  16  21  26  31  36  41  46  51  56  61     ymmv      gt  gt  gt  get process id  non-existent process                      child   subprocess Popen   pgrep    -f   name   stdout subprocess PIPE  shell False      response   child communicate   0      return  int pid  for pid in response split

User · Answer

You can use psutil package   Install  pip install psutil   Usage   import psutil  process name    chrome  pid   None  for proc in psutil process iter        if process name in proc name           pid   proc pid

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If your OS is Unix base use this code   import os def check process name       output          cmd    ps -aef   grep -i   s    grep -v  grep    awk    print  2     gt   tmp out      os system cmd   name      with open   tmp out    r   as f          line   f readline           while line              output append line strip                line   f readline               if line strip                    output append line strip         return output   Then call it and pass it a process name to get all PIDs    gt  gt  gt  check process  firefox     499    621    623    630    11733

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Since Python 3 5  subprocess run   is recommended over subprocess check output      gt  gt  gt  int subprocess run   pidof    -s    your process    stdout subprocess PIPE  stdout    Also  since Python 3 7  you can use the capture output true parameter to capture stdout and stderr    gt  gt  gt  int subprocess run   pidof    -s    your process    capture output True  stdout

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For posix  Linux  BSD  etc    only need  proc directory to be mounted  it s easier to work with os files in  proc  It s pure python  no need to call shell programs outside  Works on python 2 and 3   The only difference  2to3  is the Exception tree  therefore the  quot except Exception quot   which I dislike but kept to maintain compatibility  Also could ve created a custom exception      usr bin env python  import os import sys   for dirname in os listdir   proc        if dirname     curproc           continue      try          with open   proc    cmdline  format dirname   mode  rb   as fd              content   fd read   decode   split   x00       except Exception          continue      for i in sys argv 1            if i in content 0               print   0  lt 12     1   format dirname      join content     Sample Output  it works like pgrep   phoemur   python     pgrep py bash 1487           -bash  1779            bin bash

User · Answer

You can get the pid of processes by name using pidof through subprocess check output   from subprocess import check output def get pid name       return check output   pidof  name     In  5   get pid  java   Out 5    23366 n    check output   pidof  name   will run the command as  pidof process name   If the return code was non-zero it raises a CalledProcessError   To handle multiple entries and cast to ints   from subprocess import check output def get pid name       return map int check output   pidof  name   split      In  21   get pid  chrome    Out 21     27698  27678  27665  27649  27540  27530  27517  14884  14719  13849  13708  7713  7310  7291  7217  7208  7204  7189  7180  7175  7166  7151  7138  7127  7117  7114  7107  7095  7091  7087  7083  7073  7065  7056  7048  7028  7011  6997    Or pas the -s flag to get a single pid   def get pid name       return int check output   pidof   -s  name     In  25   get pid  chrome   Out 25   27698

User · Answer

you can also use pgrep  in prgep you can also give pattern for match  import subprocess child   subprocess Popen   pgrep   program name    stdout subprocess PIPE  shell True  result   child communicate   0    you can also use awk with ps  like this  ps aux   awk   name  print  2

User · Answer

To improve the Padraic s answer  when check output returns a non-zero code  it raises a CalledProcessError  This happens when the process does not exists or is not running   What I would do to catch this exception is      usr bin python  from subprocess import check output  CalledProcessError  def getPIDs process       try          pidlist   map int  check output   pidof   process   split        except  CalledProcessError          pidlist          print  list of PIDs            join str e  for e in pidlist   if   name         main         getPIDs  chrome     The output     python pidproc py list of PIDS   31840  31841  41942

[python] How to get PID by process name?

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