Python Decorator Patterns

A guide to writing powerful Python decorators for adding reusable cross-cutting behavior to functions and classes.

Usage

Ask about decorator patterns, parameterized decorators, class decorators, or practical decorator use cases.

Examples

• "Create a retry decorator with exponential backoff"
• "How do I write a parameterized decorator?"
• "Build a caching decorator with TTL support"

Guidelines

• Always use functools.wraps to preserve function metadata
• Use parameterized decorators for configurable behavior
• Keep decorators focused on a single concern
• Consider using classes as decorators for stateful behavior
• Stack decorators from bottom to top in execution order