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Title: Python Logging: A Stroll Through the Source Code – Real Python

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Description: In this step-by-step tutorial, you'll learn about how the Python logging package is designed from an OOP perspective. You'll walk line by line through the source code and become better equipped to know what your code is doing.

Open Graph Description: In this step-by-step tutorial, you'll learn about how the Python logging package is designed from an OOP perspective. You'll walk line by line through the source code and become better equipped to know what your code is doing.

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Table of Contentshttps://realpython.com/python-logging-source-code/#toc
Follow Along in the Source Code of Python logginghttps://realpython.com/python-logging-source-code/#follow-along-in-the-source-code-of-python-logging
Preliminarieshttps://realpython.com/python-logging-source-code/#preliminaries
Preliminary #1: A Level Is Just an int!https://realpython.com/python-logging-source-code/#preliminary-1-a-level-is-just-an-int
Preliminary #2: Logging Is Thread-Safe, but Not Process-Safehttps://realpython.com/python-logging-source-code/#preliminary-2-logging-is-thread-safe-but-not-process-safe
Package Architecture: Logging’s MROhttps://realpython.com/python-logging-source-code/#package-architecture-loggings-mro
The LogRecord Classhttps://realpython.com/python-logging-source-code/#the-logrecord-class
The Logger and Handler Classeshttps://realpython.com/python-logging-source-code/#the-logger-and-handler-classes
The Filter and Filterer Classeshttps://realpython.com/python-logging-source-code/#the-filter-and-filterer-classes
The Manager Classhttps://realpython.com/python-logging-source-code/#the-manager-class
The All-Important Root Loggerhttps://realpython.com/python-logging-source-code/#the-all-important-root-logger
The Logger Hierarchyhttps://realpython.com/python-logging-source-code/#the-logger-hierarchy
A Multi-Handler Designhttps://realpython.com/python-logging-source-code/#a-multi-handler-design
The “Why Didn’t My Log Message Go Anywhere?” Dilemmahttps://realpython.com/python-logging-source-code/#the-why-didnt-my-log-message-go-anywhere-dilemma
Taking Advantage of Lazy Formattinghttps://realpython.com/python-logging-source-code/#taking-advantage-of-lazy-formatting
Functions vs Methodshttps://realpython.com/python-logging-source-code/#functions-vs-methods
What Does getLogger() Really Do?https://realpython.com/python-logging-source-code/#what-does-getlogger-really-do
Library vs Application Logging: What Is NullHandler?https://realpython.com/python-logging-source-code/#library-vs-application-logging-what-is-nullhandler
What Logging Does With Exceptionshttps://realpython.com/python-logging-source-code/#what-logging-does-with-exceptions
Logging Python Tracebackshttps://realpython.com/python-logging-source-code/#logging-python-tracebacks
Conclusionhttps://realpython.com/python-logging-source-code/#conclusion
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Follow Along in the Source Code of Python logginghttps://realpython.com/python-logging-source-code/#follow-along-in-the-source-code-of-python-logging
Preliminarieshttps://realpython.com/python-logging-source-code/#preliminaries
Preliminary #1: A Level Is Just an int!https://realpython.com/python-logging-source-code/#preliminary-1-a-level-is-just-an-int
Preliminary #2: Logging Is Thread-Safe, but Not Process-Safehttps://realpython.com/python-logging-source-code/#preliminary-2-logging-is-thread-safe-but-not-process-safe
Package Architecture: Logging’s MROhttps://realpython.com/python-logging-source-code/#package-architecture-loggings-mro
The LogRecord Classhttps://realpython.com/python-logging-source-code/#the-logrecord-class
The Logger and Handler Classeshttps://realpython.com/python-logging-source-code/#the-logger-and-handler-classes
The Filter and Filterer Classeshttps://realpython.com/python-logging-source-code/#the-filter-and-filterer-classes
The Manager Classhttps://realpython.com/python-logging-source-code/#the-manager-class
The All-Important Root Loggerhttps://realpython.com/python-logging-source-code/#the-all-important-root-logger
The Logger Hierarchyhttps://realpython.com/python-logging-source-code/#the-logger-hierarchy
A Multi-Handler Designhttps://realpython.com/python-logging-source-code/#a-multi-handler-design
The “Why Didn’t My Log Message Go Anywhere?” Dilemmahttps://realpython.com/python-logging-source-code/#the-why-didnt-my-log-message-go-anywhere-dilemma
Taking Advantage of Lazy Formattinghttps://realpython.com/python-logging-source-code/#taking-advantage-of-lazy-formatting
Functions vs Methodshttps://realpython.com/python-logging-source-code/#functions-vs-methods
What Does getLogger() Really Do?https://realpython.com/python-logging-source-code/#what-does-getlogger-really-do
Library vs Application Logging: What Is NullHandler?https://realpython.com/python-logging-source-code/#library-vs-application-logging-what-is-nullhandler
What Logging Does With Exceptionshttps://realpython.com/python-logging-source-code/#what-logging-does-with-exceptions
Logging Python Tracebackshttps://realpython.com/python-logging-source-code/#logging-python-tracebacks
Conclusionhttps://realpython.com/python-logging-source-code/#conclusion
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