Example Python scripts which parse some arguments and log to console/file.

readme.md

Python 2.6 example

Program runs using 2.6.9 without any dependencies:

#!/user/bin/env python
"""
An example python 2.6 script which takes arguments and logs to console/file.
"""
import logging
import logging.config
import optparse

def main():
    logging.config.fileConfig('logging.conf')

    log = logging.getLogger('kittest')
    log.info('kittest starting...')

    try:
        usage = "usage: %prog [options]"
        parser = optparse.OptionParser(usage)
        parser.add_option('--source_db', dest="source_db", help='source database')
        parser.add_option('--source_table', dest="source_table", help='source table')

        (options, args) = parser.parse_args()
        log.info('Source is %s.%s', options.source_db, options.source_table)
    except:
        log.exception('Error in main')
        raise

    log.info('kittest complete!')

if __name__ == '__main__':
    main()

Log configuration file logging.conf:

[loggers]
keys=root

[handlers]
keys=consoleHandler,rotatingFileHandler

[formatters]
keys=simpleFormatter

[logger_root]
level=DEBUG
handlers=consoleHandler,rotatingFileHandler

[handler_consoleHandler]
class=StreamHandler
level=DEBUG
formatter=simpleFormatter
args=(sys.stdout,)

[handler_rotatingFileHandler]
class=handlers.RotatingFileHandler
level=DEBUG
formatter=simpleFormatter
args=('app.log', 'a', 1000, 3)

[formatter_simpleFormatter]
format=%(asctime)s - %(name)s - %(levelname)s - %(message)s
datefmt=

Python 3.5 example

Dependency on PyYAML.

#!/user/bin/env python
"""
An example python script which takes arguments and logs to console/file. Requires PyYAML to parse config.
"""
import logging
import logging.config
import argparse
import yaml

def main():
    with open('logging.yaml', 'r') as logconfig:
        cfg = yaml.safe_load(logconfig)
    
    #logging.config.fileConfig('logging.conf')
    logging.config.dictConfig(cfg)
    log = logging.getLogger('kittest')
    log.info('kittest starting...')

    parser = argparse.ArgumentParser(description='Kit\'s test python script')
    parser.add_argument('source_db', help='source database')
    parser.add_argument('source_table', help='source table')

    args = parser.parse_args()
    log.info('Source is %s.%s', args.source_db, args.source_table)
    for 
    log.info('kittest complete!')

if __name__ == '__main__':
    main()

Logging configuration file logging.yaml:

version: 1
formatters:
  simple:
    format: '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
handlers:
  console:
    class : logging.StreamHandler
    formatter: simple
    stream  : ext://sys.stdout
  file:
    class : logging.handlers.RotatingFileHandler
    formatter: simple
    filename: kittest.log
    maxBytes: 1024
    backupCount: 3    
root:
  level: DEBUG
  handlers: [console,file]