Besides using the print statements and the debugging tools sometimes (more and more frequently) I’m seeing in the code the logging module. According to the python documentation:

This module defines functions and classes which implement a flexible event logging system for applications and libraries.

The key benefit of having the logging API provided by a standard library module is that all Python modules can participate in logging, so your application log can include your own messages integrated with messages from third-party modules.

https://docs.python.org/3/library/logging.html#module-logging

So you can create a simple logging warning with the following scrip:

import logging
logging.warning("Ey, this is a logging warning")

You’ll see the warning output

WARNING:root:Ey, this is a logging warning

The logging module has different values for the most commons events:

If you are wondering the possibility to add color to your messages you can see this stack overflow question with a lot of comments: How can I color Python logging output?

Sources:

• Python Documentation: logging module
• Python Documentation: Logging How to