Run commands in terminal via python

Asked Jan 29 '19 at 11:59

Active Jan 29 '19 at 11:59

Viewed 82 times

I have this python script(discord.py):

elif message.content.startswith('/mz stop'):   
     for line in os.popen("ps ax | grep /MYSCRIPT | grep -v grep"):
         fields = line.split()
         pid = fields[0]
         os.system('kill -9 '+pid)
elif message.content.startswith('/mz start'):
     bashCommand = "nohup bash start.sh"
     process = subprocess.Popen(bashCommand.split(), stdout=subprocess.PIPE)
     output, error = process.communicate()

If I use /mz start in discord before /mz stop, "/mz stop" doesn't works. But If the command "/mz stop" before, it works and kill the process. After /mz start i got this: nohup: ignoring input and redirecting stderr to stdout and python stdout is killed(I can't use print() )

asked Jan 29 '19 at 11:59

Bogdan

It seems that the real problem here is that you are using `nohup`. Why do you want to run Bash from Bash from Python anyway? – tripleee Jan 29 '19 at 12:02
Because I want to run script after logout! – Bogdan Jan 29 '19 at 12:05
Then this Python script should run with `nohup`, and any subprocesses (shell or otherwise) will inherit that. – tripleee Jan 29 '19 at 12:25
`bashCommand = "bash start.sh"`? – Bogdan Jan 29 '19 at 12:32
and `nohup python3 script.py`? – Bogdan Jan 29 '19 at 12:33
Yeah well the Bash should not be necessary if the script has a proper shebang, and then putting `["start.sh"]` in a list yourself is easier than calling `split()` on the string. – tripleee Jan 29 '19 at 12:35
Can you answer me with a full code? If you want! – Bogdan Jan 29 '19 at 12:38
I'm not sure if it will solve your problem and this snippet has many unrelated antipatterns which I don't have the time and energy to tackle right now. Maybe see also https://stackoverflow.com/questions/4256107/running-bash-commands-in-python – tripleee Jan 29 '19 at 12:39
Ok, thanks anyway! – Bogdan Jan 29 '19 at 12:43

Run commands in terminal via python

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