import os
import sys
import logging

logger = logging.getLogger(__name__)

formatter = logging.Formatter('%(asctime)s %(levelname)s [%(name)s] %(message)s')
logger.setLevel(logging.DEBUG)
    
stderr_handler = logging.StreamHandler(sys.stderr)
stderr_handler.setFormatter(formatter)
logger.addHandler(stderr_handler)
    
logfile = os.path.join("test.log")
file_handler = logging.FileHandler(logfile)
file_handler.setFormatter(formatter)
logger.addHandler(file_handler)

logger.info('xxxx')
logger.error('yyyy')