# module1.py # 
import logging
logger = logging.getLogger(__name__)
def explain():
    logger.info("this is a log message from module1.py")

# module2.py #
import logging                                                                                                                                           
logger = logging.getLogger(__name__)
def explain():
    logger.info("this is a log message from module2.py")

# main.py #
import logging
import module1
import module2

logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(name)s - %(levelname)s - %(message)s")
logger = logging.getLogger(__name__)

if __name__=="__main__":
    logger.info("this is a log message from main.py")
    module1.explain()
    module2.explain()