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.
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6 Answers
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:
...
2 Comments
monty0
proc.communicate(tardata) says TypeError: must be string or buffer, not _io.BytesIO
Dietrich Epp
then
tardata.getvalue() has your answerYou 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).
2 Comments
tshepang
That OP asked for Python 3 option, but you mentioned paramiko anyways. But I agree the downvote is undeserved, given that's not all you said. Forgive me.
klaas
the paramiko homepage now states that it also works with python 3.3+. Quote:"Paramiko is a Python (2.6+, 3.3+) implementation of the SSHv2 protocol [1], providing both client and server functionality..."
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 [email protected] <== change
Now with python
from subprocess import PIPE, Popen
cmd = 'uname -a'
stream = Popen(['ssh', '[email protected]', cmd],
stdin=PIPE, stdout=PIPE)
rsp = stream.stdout.read().decode('utf-8')
print(rsp)
Comments
It might take a little work because "twisted:conch" does not appear to have a 3.0 variant.
Comments
I have written Python bindings for libssh2, that run on Python 2.4, 2.5, 2.6, 2.7 and 3.
Comments
libssh2 works great for Python 3.x.
See this Stack Overflow article
How to send a file using scp using python 3.2?
1 Comment
exhuma
No documentation available. Links on the pypi project page are dead!