[Tutor] Python Logging Module

[chase.mp at gmail.com]

Hello everyone...

My intention is to create a generic logging function I can use across  
scripts. I have a few things I would like this function to be able to  
accomplish:

1. log info and above to console
2. log debug and above to file
3. format the output for each differently
4. allow areas of a program to use a different "logger", basically putting  
a different name in the event depending on which of my bad ideas broke the  
system
5. control log rotation within the script itself

so far I have accomplished a lot of hair pulling...the following does some  
of the above:

import logging
import sys

LOG_FILENAME = "./testing.log"

def set_logging():
# Set up a specific logger
my_logger = logging.getLogger(sys.argv[0])
# set up logging defaults
logging.basicConfig(level=logging.DEBUG,
format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
datefmt='%m-%d %H:%M:%S',
filename=LOG_FILENAME,
filemode='w')
# define a Handler which writes INFO messages or higher to the sys.stderr
console = logging.StreamHandler()
console.setLevel(logging.INFO)
# set a format which is simpler for console use
formatter = logging.Formatter('%(levelname)-8s %(message)s')
# tell the handler to use this format
console.setFormatter(formatter)
# add the handler to the root logger
logging.getLogger('').addHandler(console)


set_logging()
logging.debug("test_debug")
logging.info("testing_info")

I also have a separate bit that can do the rotation:

import glob
import logging
import logging.handlers
import sys

LOG_FILENAME = './logging_rotateout'

# Set up a specific logger with our desired output level

fullscriptname = os.path.split(sys.argv[0])
scriptname = fullscriptname[1]
log = logging.getLogger(scriptname)
log.setLevel(logging.DEBUG)

# Add the log message handler to the logger
handler = logging.handlers.RotatingFileHandler(LOG_FILENAME, maxBytes=20,  
backupCount=5)

log.addHandler(handler)

#log messages
log.debug("testing")
log.info("console")


I cannot for the life of me seem to combine these two functions, this seems  
odd to me, but I think I do not understand what logging.basicConfig does in  
the previous example. If I try to add:

handler = logging.handlers.RotatingFileHandler(LOG_FILENAME, maxBytes=20,  
backupCount=5)
logging.getLogger('').addHandler(handler)

to the first piece of code I get all kinds of errors, but mainly:

AttributeError: 'module' object has no attribute handlers

I get this even though the line above it obviously adds the console  
handler. I have tried many things, I wish I had documented better all of my  
attempts at syntax.

Any help would be greatly appreciated. Thanks.
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