SSH Connection with Python 3.0

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Question :

SSH Connection with Python 3.0

How can I make an SSH connection in Python 3.0? I want to save a file on a remote computer where I have password-less SSH set up.

Answer #1:

I recommend calling ssh as a subprocess. It’s reliable and portable.

import subprocess
proc = subprocess.Popen(['ssh', 'user@host', 'cat > %s' % filename],
                        stdin=subprocess.PIPE)
proc.communicate(file_contents)
if proc.retcode != 0:
    ...

You’d have to worry about quoting the destination filename. If you want more flexibility, you could even do this:

import subprocess
import tarfile
import io
tardata = io.BytesIO()
tar = tarfile.open(mode='w:gz', fileobj=tardata)
... put stuff in tar ...
proc = subprocess.Popen(['ssh', 'user@host', 'tar xz'],
                        stdin=subprocess.PIPE)
proc.communicate(tardata.getvalue())
if proc.retcode != 0:
    ...
Answered By: Dietrich Epp

Answer #2:

First:

Two steps to login via ssh without password

in your terminal

[macm@macm ~]$  ssh-keygen
[macm@macm ~]$  ssh-copy-id -i $HOME/.ssh/id_rsa.pub root@192.168.1.XX <== change

Now with python

from subprocess import PIPE, Popen

cmd = 'uname -a'
stream = Popen(['ssh', 'root@192.168.1.XX', cmd],
                    stdin=PIPE, stdout=PIPE)

rsp = stream.stdout.read().decode('utf-8')
print(rsp)
Answered By: macm

Answer #3:

You want all of the ssh-functionality implemented as a python library? Have a look at paramiko, although I think it’s not ported to Python 3.0 (yet?).

If you can use an existing ssh installation you can use the subprocess way Dietrich described, or (another way) you could also use pexpect (website here).

Answered By: ChristopheD

Answer #4:

It might take a little work because “twisted:conch” does not appear to have a 3.0 variant.

Answered By: Richard

Answer #5:

I have written Python bindings for libssh2, that run on Python 2.4, 2.5, 2.6, 2.7 and 3.

Answered By: Sebastian Noack

Answer #6:

libssh2 works great for Python 3.x.
See this Stack Overflow article
How to send a file using scp using python 3.2?

Answered By: Don

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