python logger

log.py

#!/usr/bin/env python
import argparse
import logging

def main():
  logging.debug('main')
  
if __name__ == '__main__':
  parser = argparse.ArgumentParser()
  parser.add_argument('--log',
                      metavar='l',
                      type=str,
                      default='INFO',
                      help="WARNING, INFO, DEBUG. Default is INFO")  args = parser.parse_args() 
  
  logging.basicConfig(level=getattr(logging, args.log.upper(), 'INFO'))
  main()  
  logging.info('start')  
  logging.error('error')