Writing to Airflow Logs
You can import the logging module into your code and write to logs that way
import logging
logging.info('Hello')
Here are some more options
import logging
logging.debug('This is a debug message')
logging.info('This is an info message')
logging.warning('This is a warning message')
logging.error('This is an error message')
logging.critical('This is a critical message')
You might use airflow logger
import logging
logger = logging.getLogger("airflow.task")
logger.error("Your custom error")
There's a logger mixin class you can use:
https://github.com/apache/airflow/blob/main/airflow/utils/log/logging_mixin.py
from airflow.utils.log.logging_mixin import LoggingMixin
LoggingMixin().log.info("Hello")
Then in airflow logs you'll see:
[2021-07-07 15:55:42,370] {{logging_mixin.py:112}} INFO - Hello