Intermediate Course
Lesson 9 of 100

Decorators in Practice — @validate, @log_calls, @require_auth

Apply decorators to solve real problems in the budget dashboard — validation, audit logging, and authentication checks.

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Lesson Briefing

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"Everything clicks together in this lesson. You've learned closures, the decorator pattern, functools.wraps, parameterisation, stacking, class-based decorators, and production patterns. Now you apply them all to the actual budget dashboard. You'll build the decorator library the dashboard uses: input validation, audit trail logging, authentication, caching, and budget enforcement. This is the decorator toolkit lesson — the one you refer back to when building real features."

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