logger.py

import logging

logger = logging.getLogger("demo")
logger.setLevel(logging.DEBUG)

stream_handler = logging.StreamHandler()
stream_handler.setLevel(logging.DEBUG)
logger.addHandler(stream_handler)

file_handler = logging.FileHandler("logs.txt")
file_handler.setFormatter(
    logging.Formatter("%(asctime)s - %(filename)s:%(lineno)d - %(message)s", datefmt="%Y-%m-%d %H:%M:%S")
)
logger.addHandler(file_handler)