CODEWITHSUNDEEP
pythonunixkillpsprocesslist
Johan Carlsson
Johan Carlsson

Reputation: 803

how do I get the process list in Python?

How do I get a process list of all running processes from Python, on Unix, containing then name of the command/process and process id, so I can filter and kill processes.

Upvotes: 23

Views: 60653

Answers (5)

AsmitTheCoder
AsmitTheCoder

Reputation: 35

Install psutil:

$pip install psutil

Import psutil:

>>> import psutil

Define list where process list is to be saved:

>>> processlist=list()

Append processes in list:

>>> for process in psutil.process_iter():
        processlist.append(process.name())

Get Process list:

>>> print(processlist)

Full code:

import psutil
processlist=list()
for process in psutil.process_iter():
    processlist.append(process.name())
print(processlist)

Upvotes: -1

Giampaolo Rodolà
Giampaolo Rodolà

Reputation: 13066

The right portable solution in Python is using psutil. You have different APIs to interact with PIDs:

>>> import psutil
>>> psutil.pids()
[1, 2, 3, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, ..., 32498]
>>> psutil.pid_exists(32498)
True
>>> p = psutil.Process(32498)
>>> p.name()
'python'
>>> p.cmdline()
['python', 'script.py']
>>> p.terminate()
>>> p.wait()

...and if you want to "search and kill":

for p in psutil.process_iter():
    if 'nginx' in p.name() or 'nginx' in ' '.join(p.cmdline()):
        p.terminate()
        p.wait()

Upvotes: 37

Vinay Sajip
Vinay Sajip

Reputation: 99355

On Linux, with a suitably recent Python which includes the subprocess module:

from subprocess import Popen, PIPE

process = Popen(['ps', '-eo' ,'pid,args'], stdout=PIPE, stderr=PIPE)
stdout, notused = process.communicate()
for line in stdout.splitlines():
    pid, cmdline = line.split(' ', 1)
    #Do whatever filtering and processing is needed

You may need to tweak the ps command slightly depending on your exact needs.

Upvotes: 13

krawyoti
krawyoti

Reputation: 20135

On linux, the easiest solution is probably to use the external ps command:

>>> import os
>>> data = [(int(p), c) for p, c in [x.rstrip('\n').split(' ', 1) \
...        for x in os.popen('ps h -eo pid:1,command')]]

On other systems you might have to change the options to ps.

Still, you might want to run man on pgrep and pkill.

Upvotes: 3

nik
nik

Reputation: 13450

Why Python?
You can directly use killall on the process name.

Upvotes: -10

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