output to a text file a

You have to tell the filename to the logging.basicConfig().  See http://docs.python.org/howto/logging.html#logging-to-a-file

Try:

import logging

logging.basicConfig(filename='mylog.txt')

log = logging.getLogger("MyApp")
log.setLevel(logging.DEBUG) #set verbosity to show all messages of severity >= DEBUG
log.info("Starting my app")
try:
    i = 5 / 0
except Exception as e:
    log.exception("There was a problem." )
log.info("Ending my app")

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thanks

Pepr When I set up my logger how do I have it record the DEBUG info for every module ?

Frankly, I do not use the logging module, nor I did study deeply the documentation (see http://docs.python.org/howto/logging.html#logging-howto).  Because of that I can only guess what is the usual approach.  But the following worked for me...

Firstly, you can set the name of the log file in the main application only.  Notice that the import of the other modules (here moduleA) is done after that.

myApp.py

import logging
logging.basicConfig(filename='myApplog.txt')

import moduleA

def main():
    log = logging.getLogger(__name__)
    log.setLevel(logging.DEBUG) #set verbosity to show all messages in the main application
    log.info("Starting the application.")

    # Calling the module function (causes logging).
    moduleA.fn()    

    log.info("Finishing the application.")

    
if __name__ == '__main__':
    # Start the body of the application.
    main()

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The modules also import the logging module, but they do not set the log filename:


moduleA.py

import logging

log = logging.getLogger(__name__)
log.setLevel(logging.DEBUG) #set verbosity to show all messages of severity >= DEBUG
log.info("Starting moduleA")

def fn():
    log.info("fn() called")

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The complication is caused only by the approach when the logger (logging.getLogger()) is calling when the module is imported.  Probably more usual approach is the get the logger inside the function that wants to log via the name of the module (I will try and post later).

thank you pepr ...

Pepr you are the best

You are welcome.  And stop kidding :))  You are also the best.  You only do not know it, yet. ;)  (Part of the reason is that you still have too much hair :)