code: def main():
      
      log = logging.getLogger(mod_logger + '.main')
      log.debug('This is DEBUG!')
      log.info('This is INFO!')
      log.warning('This is WARNING!')
      log.error('This is ERROR!')
      log.info('Running s3util.main...')
      my_bucket = 'cons3rt-deploying-cons3rt'
      my_regex = 'sourcebuilder.*apache-maven-.*3.3.3.*'
      try:
          s3util = S3Util(my_bucket)
      except S3UtilError as e:
          log.error('There was a problem creating S3Util:\n%s', e)
      else:
          log.info('Created S3Util successfully')
          key = s3util.find_key(my_regex)
          test = None
          if key is not None:
              test = s3util.download_file(key, '/Users/yennaco/Downloads')
          if test is not None:
              upload = s3util.upload_file(test, 'media-files-offline-assets/test')
              log.info('Upload result: %s', upload)
      log.info('End of main!')
docs: Sample usage for this python module
  
      This main method simply illustrates sample usage for this python
      module.
  
      :return: None