I used the new paramiko succesfully with ansible-molecule, so if you spot a bug in it, please include a link to that bug, so we can follow it.

Paramiko lacked a new release for a very long time and someone even ended up with a fork paramiko-ng due to that. Hopefully this is about to change and new releases will be more often... the. cryptography deprecation warnings were very annoying.  

-- sorin
On 11 Jun 2019, 15:17 +0100, Pierre Riteau <pierre@stackhpc.com>, wrote:
Hello,

paramiko 2.5.0 was released yesterday [1]. It appears to trigger
failures in the Kayobe molecule job with the following error [2]:

ImportError: cannot import name py31compat

It's not clear yet why this is happening, since py31compat lives in
setuptools. paramiko 2.5.0 includes changes to paramiko/py3compat.py
which could be related.
For now, we're capping paramiko [3] as it is blocking our gate.

I thought I would share with the list, in case other projects
experience similar errors.

Cheers,
Pierre

[1] https://pypi.org/project/paramiko/#history
[2] http://logs.openstack.org/17/664417/1/check/kayobe-tox-molecule/0370fdd/job-output.txt.gz
[3] https://review.opendev.org/#/c/664533/