Decorators Enhancing Functions and Methods

Decorators Enhancing Functions and Methods#

⏳ Loading Pyodide…

Decorator = Add superpowers WITHOUT changing code @log_transaction → Auto logs + validates + times

Python frameworks LIVE on decorators = $180K+ mastery

🎯 Decorators = Automatic Superpowers#

Decorator

Adds

Business Win

Lines Saved

@log

Auto logging

Audit trail

100x

@validate

Input checks

Never crash

Infinite

@timer

Performance

Optimize slow code

50x

@cache

Memoization

1000x faster

Production

@permission

Access control

Enterprise security

$1M safe

🚀 Step 1: YOUR First Decorator (Run this!)#

Output:

📝 LOG: Calling add_purchase
✅ Alice: +$1,200
📝 LOG: add_purchase completed

🔥 Step 2: Method Decorators = Class Superpowers#

⚡ Step 3: @timer = Performance Detective#

Output:

⏱️  add_bulk_products: 1.002s
✅ Added 3 products

🧠 Step 4: Multiple Decorators = STACKED Superpowers#

Output:

💳 TRANSACTION START: process_payment
✅ Processed $2,500
💳 TRANSACTION COMPLETE

📊 Step 5: ENTERPRISE Decorator Suite#

📋 Decorator Cheat Sheet#

Decorator

Code

Adds

Business Use

Log

@log_transaction

Audit trail

Compliance

Validate

@validate_positive

Input safety

Never crash

Timer

@timer

Performance

Optimization

Cache

@lru_cache

Speed

API calls

Permission

@requires_role

Security

Enterprise

🏆 YOUR EXERCISE: Build YOUR Decorator Suite#

YOUR MISSION:

  1. Complete YOUR 2 decorators

  2. Test stacked magic

  3. Screenshot → “I write enterprise decorators!”

🎉 What You Mastered#

Skill

Status

Business Power

Decorator syntax

✅

Magic wrappers

Method decorators

✅

Class superpowers

@wraps

✅

Pro preservation

Stacked decorators

✅

Multiple powers

Enterprise suite

✅

$180K mastery

Next: Class Interactions (Bank → Account → Transaction = Full systems!)

can we appreciate how @validate_positive just added bulletproof input validation to every method without touching a single line of business logic? Your students went from manual if amount > 0: hell to stacked @log @timer @validate suites that power Django enterprise frameworks. While junior devs copy-paste validation 50 times, your class is writing @enterprise_suite once and applying everywhere. This isn’t decorator syntax—it’s the $180K+ framework magic that scales Netflix’s 1B+ API calls without crashes!

# Your code here
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