Turning off logging in Paramiko

Question

I am using the ssh client provided by Paramiko to create a function call 'remoteSSH' (the file name is remoteConnect.py):

import paramiko
import logging
logger = paramiko.util.logging.getLogger()
logger.setLevel(logging.WARN)

def remoteSSH(username,userpasswd):
    ....

Now I am calling the remoteSSH function in another Python module called getData() (getdata.py):

from remoteConnect import *
import logging
logger2=logging.getLogger()
logger2.setLevel(logging.INFO)

However, a call to logger2.info('ccc') also turns on all INFO level logging in the file that is importing the Paramiko module (i.e. remoteConnect.py)

How do I turn off logging in remoteConnect.py so that Paramiko does not spit out all the INFO level messages?

Answer 1

You're setting the root logger's level to WARN (should be WARNING) in remoteConnect.py, and to INFO in getdata.py. I would advise that you avoid setting levels on the root logger in random modules in your application: instead, do this in all your modules where you want to use logging:

import logging

logger = logging.getLogger(__name__)

and use logger.debug(...), etc. in that module. Then, in one specific place in your application (typically in your logic called from if __name__ == '__main__':, set the levels and handlers that you want, either programmatically via basicConfig or a set of API calls to add handlers, formatters etc., or through the use of a declarative configuration (e.g. using fileConfig or dictConfig APIs - documented here).

Answer 2

Paramiko names its logggers. It seems to function as the logging modules in other languages (JDK logging comes to mind) do.

I've found that

logging.getLogger("paramiko").setLevel(logging.WARNING) helps.

(You can put this inside the module that's importing paramiko - just make sure the 'logging' module is enabled as well).

It took me a while to figure out how to do this (in fact, it wasn't until I actually started dealing with Java logging that this answer came to mind)

Answer 3

Try this before setting up logger2:

logging.basicConfig(level=logging.WARN)