Process list on Linux via Python

Question

How can I get running process list using Python on Linux

User · Answer

The sanctioned way of creating and using child processes is through the subprocess module.

import subprocess
pl = subprocess.Popen(['ps', '-U', '0'], stdout=subprocess.PIPE).communicate()[0]
print pl

The command is broken down into a python list of arguments so that it does not need to be run in a shell (By default the subprocess.Popen does not use any kind of a shell environment it just execs it). Because of this we cant simply supply 'ps -U 0' to Popen.

User · Answer

import os lst   os popen  sudo netstat -tulpn   read   lst   lst split   n   for i in range 2 len lst        print lst i

User · Answer

IMO looking at the  proc filesystem is less nasty than hacking the text output of ps   import os pids    pid for pid in os listdir   proc   if pid isdigit     for pid in pids      try          print open os path join   proc   pid   cmdline     rb   read   split   0       except IOError    proc has already terminated         continue

User · Answer

You can use a third party library  such as PSI      PSI is a Python package providing real-time access to processes and other miscellaneous system information such as architecture  boottime and filesystems  It has a pythonic API which is consistent accross all supported platforms but also exposes platform-specific details where desirable

User · Answer

You could use psutil as a platform independent solution   import psutil psutil pids     1  2  3  4  5  6  7  46  48  50  51  178  182  222  223  224  268  1215  1216  1220  1221  1243  1244  1301  1601  2237  2355  2637  2774  3932  4176  4177  4185  4187  4189  4225  4243  4245   4263  4282  4306  4311  4312  4313  4314  4337  4339  4357  4358   4363  4383  4395  4408  4433  4443  4445  4446  5167  5234  5235   5252  5318  5424  5644  6987  7054  7055  7071

User · Answer

I would use the subprocess module to execute the command ps with appropriate options  By adding options you can modify which processes you see  Lot s of examples on subprocess on SO  This question answers how to parse the output of ps for example    You can  as one of the example answers showed also use the PSI module to access system information  such as the process table in this example

User · Answer

from psutil import process iter from termcolor import colored  names      ids       x   0 z   0 k   0 for proc in process iter        name   proc name       y   len name      if y gt x          x   y     if y lt x          k   y     id   proc pid     names insert z  name      ids insert z  id      z    1  print colored  quot Process Name quot    yellow     x-k-5   quot   quot   colored  quot Process Id quot    magenta    for b in range len names -1       z   x     print colored names b    cyan    x-len names b     quot   quot  colored ids b    white

[python] Process list on Linux via Python

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