Develop Reference

Run python code on remote python process

I have to run python code on remote python process.
Normally, what I would do is:
ssh admin#localhost -p 61234
which opens a interactive python console and I can execute python code directly.
>>> print('3')
3
>>>
But I want to automate this and pass python code as parameter to ssh.
I tried following options:
ssh admin#localhost -v -p 61234 python logs.py
ssh admin#localhost -v -p 61234 nohup python logs.py
ssh admin#localhost -p 61234 < logs.py
cat logs.py | ssh admin#localhost -p 61234 python -
But all options give following error:
shell request failed on channel 0
logs.py:
#!/usr/bin/env python
# tried with and without first line.
print('3')
netstat -anp | grep 61234
tcp 0 0 127.0.0.1:61234 0.0.0.0:* LISTEN 6/python2.7
Is there a way to do this?

Pretty sure this is overkill, but who knows, maybe you need more than just a simple command in the future.
Paramiko package is what you're looking for. The project is full of demos which demonstrate how and in many different ways.
The function you'll find the most useful is paramiko.client.SSHClient.exec_command
Execute a command on the SSH server. A new Channel is opened and the
requested command is executed. The command’s input and output streams
are returned as Python file-like objects representing stdin, stdout,
and stderr.
Demos Folder
In-depth Testing
Interactive.py is a fully interactive TTY (remote terminal control functions).

PyCharm Professional Edition (Python IDE from JetBrains) has tools for remote development, including SSH remoting, and the ability to run a remote interpreter:

Execute a program using python on windows

I am new to windows python. I am trying to run a command line tool using python. This tool will flash the firmware connecting to IP address of the machine. I could open cmd prompt and use the command
C:\ToolsSuite>sdi --ip 172.23.240.41 --fwdl "c:\BUILDS\firmware_image.zip
.This works for me very well.
But when I try to execute using the python script on windows, I am not able to do that. Python script looks like this.
import subprocess
import os
os.chdir(r"C:\ToolsSuite")
#os.system('cd c:\mydir')
os.system("sdi --ip 192.92.48.32 --fwdl C:\firmware_image.zip")
#subprocess.Popen(r'sdi --ip 192.92.48.32 --fwdl "c:\firmware_image.zip"', shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
The exception thrown is "Could not find file". I am not getting how to give the path of the firmware file when it is stored in some location, say for example 'C' drive or in some folder location of windows.

If the sdi executable is in "C:\ToolsSuite", this should work:
subprocess.call(['sdi', '--ip 192.92.48.32', r'--fwdl "c:\firmware_image.zip"'])

If you want to call a Windows command, you need to give the full path to the command.
You can try:
import subprocess
import os.path
# C:\ToolsSuite>sdi --ip 172.23.240.41 --fwdl "c:\BUILDS\firmware_image.zip"
cmd = os.path.join("C:\\ToolsSuite", "sdi")
args = [cmd,
'--ip', '172.23.240.41',
'--fwdl', 'c:\\BUILDS\\firmware_image.zip']
subprocess.check_call(args)
Here, check_call is useful to replace non-zero exit code by an exception. Of course, you can also choose another function of the same family.

PuTTY Windows pywinauto background

I did a script on Windows using PuTTY:
from pywinauto.application import Application
app = Application().Start(cmd_line='C:\Program Files (x86)\PuTTY\putty.exe -l user -pw **pwd** -load Proxy_10.153.1.250 '+ ip +' -ssh')
putty = app.PuTTY
putty.Wait('ready')
time.sleep(7)
cmd1 = "show log "+ "{ENTER}"
This script will be executed for many switchs, but when it is executed, I cannot do other tasks on Windows else script will be interrupted? Is it possible to be executed in background?

You need a proper tool for CLI automation. Just run subprocess.call('ssh user#host <the rest of cmd>') or use Paramiko to run remote SSH command.
BTW, pywinauto's code is incomplete, I don't see .type_keys(cmd1). You may try .send_chars(cmd1) instead and use putty.minimize() first. But send_chars is not guaranteed to work with every app (and it's experimental). So you can just try.

psexec run python script passed from host

I am trying to run a python script on a remote computer via psexec. I am able to connect and run python.exe with the following:
C:\test>psexec \\192.168.X.X -u domain\administrator -p password -i C:\Anaconda\python.exe
The path to python.exe is the path on the remote machine. This opens a python window on the remote machine - all good.
I want to now pass a python script from the host machine to run on the remote. This script is on the host machine in C:\test\test.py. I tried
psexec \\192.168.X.X -u domain\administrator -p password -i "C:\Anaconda\python.exe" -c C:\test\test.py
and get:
C:\Anaconda\python.exe exited on 192.168.X.X with error code 1.
I also tried-c test.py without the full path, and got a similar error. My thought is the remote application cannot find C:\test\test.py. I want to be able to pass the script from the host machine.
Any help is much appreciated. Thanks.

If the .py extension has been associated with the Python installation on the remote machine, you may be able to run your Python script by simply removing the Python executable from the command line:
psexec \\192.168.X.X -u domain\administrator -p password -i -c C:\test\test.py
Please note that I have not tried this as I don't presently have access to a remote machine, so I can't guarantee that it will work.
The line
psexec \\192.168.X.X -u domain\administrator -p password -i "C:\Anaconda\python.exe" -c C:\test\test.py
may be trying to run the command "C:\Anaconda\python.exe" -c C:\test\test.py on the remote machine. In other words, Python may be interpreting the -c switch, rather than PsExec. The Python switch -c specifies some Python code to run, and of course a filename is not valid Python code:
C:\Users\Luke>python -c "print 2 + 2"
4
C:\Users\Luke>python -c C:\test\test.py
File "<string>", line 1
C:\test\test.py
^
SyntaxError: invalid syntax
C:\Users\Luke>echo %ERRORLEVEL%
1

Was able to access a python script on a shared drive from the remote computer and host, and so by copying to the share from the host and reading from the share on the remote machine i had a suitable workaround (the -i switch is not required).
psexec \\remote_machine_name -u domain\user -p pswrd -i C:/Anaconda/python.exe \\server\share\test\test.py
Related: if you are running on windows and writing to a UNC path from a python script i.e test.py above, helpful path formatting help:
python copy files to a network location on Windows without mapping a drive

how to invoke sshfs within python script?

I want to mount a remote directory using sshfs. sshfs working fine from terminal.
But how to invoke it from within python script?
I tried something like this - but didn't work at all.
import os
cmd = "/usr/bin/sshfs giis#giis.co.in:/home/giis /mnt"
os.system(cmd)

first, you should make sure your sshfs command works fine using the shell. Then, go to here to see many examples of using subprocess module of Python to call your sshfs commmand

import subprocess
mount_command = f'sshfs {host_username}#{host_ip}:{host_data_directory} {local_data_directory}'
subprocess.call(mount_command, shell=True)
# Do your stuff with mounted folder
unmount_command = f'fusermount -u {local_data_directory}'
subprocess.call(unmount_command, shell=True)