logger.py

# Official doc: https://docs.python.org/3/howto/logging-cookbook.html
import os

import logging

from logging import StreamHandler
from logging import Formatter

LOGS_DIR = os.path.join(os.path.dirname(os.path.realpath(__file__)), '../logs')
if not os.path.exists(LOGS_DIR):
    os.mkdir(LOGS_DIR)

LOG_FORMAT = (
    "%(asctime)s [%(levelname)s]: %(message)s in %(pathname)s:%(lineno)d")

STREAM_HANDLER = StreamHandler()
STREAM_HANDLER.setFormatter(Formatter(LOG_FORMAT))

FILE_HANDLER = logging.FileHandler(os.path.join(LOGS_DIR, 'my_package.log'))
FILE_HANDLER.setFormatter(Formatter(LOG_FORMAT))

package_logger = logging.getLogger('my_package')
package_logger.addHandler(STREAM_HANDLER)
package_logger.addHandler(FILE_HANDLER)
package_logger.setLevel(logging.DEBUG)