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Logging is an integral part of most modern apps. Almost all programming platforms provide built-in logging support with copious documentation. However, using logging APIs well takes some effort as one has to read the documentation and experiment with code samples.

This guide is an attempt to reduce this effort and help developers to quickly be productive with logging API offered by Python's logging module. The guide is intended to supplement the reference documentation of Python's logging module.

What does the booklet contain?

The booklet contains a three-part guide.

The first part introduces concepts and terms pertaining to logging in a programming language-agnostic manner.
The second part describes how various elements of Python's logging module support these concepts and terms. This part covers both the API used for logging and the support for configuring the logging library.
The third part discusses good practices and gotchas to consider when using Python's logging module. It also presents some performance considerations to keep in mind when using the logging module.

To keep the guide short and respect the readers' time, I have tried to limit the presentation to definitions, rationale, samples, recommendations, and explanations, where necessary. When more details are warranted and are available in abundance elsewhere, links to such references are provided.

Help a Cause

Initially, I started creating an article about logging in Python for Coralogix. Then, the COVID-19 situation happened. As a way to help out with the COVID-19 situation, we decided to publish the article as an electronic book and contribute part of royalty from each sale to organizations helping out with COVID-19 situation. Specifically, from each sale, royalty over $5 or 50% of the royalty, whichever is higher, will be donated.

I am thankful to Coralogix for sponsoring this booklet and helping out with a cause.

So, while the contents of this booklet is freely available online, I hope you will purchase an electronic version of the booklet and help a cause.

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