Errors & Logging

10 pages in this section.

Errors vs Logging: The Two-Channel Mental Model

Why exceptions and logging are two separate channels - one for control flow, one for observability - and how the exception hierarchy, chaining, and exception groups all serve the first channel while the logging module serves the second - the mental model behind every other page in this section.

Explainer Python Errors Logging Exceptions

Exceptions Basics

`try`/`except`/`else`/`finally` and the exception hierarchy.

Python Errors Logging Exceptions Basics

Raising & Chaining

`raise ... from`, re-raising, and preserving tracebacks.

Python Errors Logging Exceptions Chaining

Custom Exception Hierarchies

Designing meaningful, catchable error types.

Python Errors Logging Exceptions Hierarchy

Exception Groups & except*

Python Errors Logging Exception Groups Except Star