Python for Beginners - Lesson 19: Your First Real Application (Building a To-Do List)

It's time to build! In Lesson 19 of our Python for Beginners course, we move from theory to practice and architect your first complete console application: a functional To-Do List Manager.

This is where all the pieces come together. You'll learn how professional developers plan, build, and test their software, transforming individual skills into a cohesive, useful program.

*🎓 Get the FULL Python for Beginners Course with:*
• 20 comprehensive lessons from beginner to intermediate.
• Interactive coding exercises for every concept.
• Hands-on projects to build your portfolio.
• 24/7 AI Tutor support for any question.
• A certificate of completion to boost your resume.

👉 *Start your journey on our platform:* https://aiedugenius.com/

---

*🕒 Timestamps:*

00:00 - Introduction: From Blueprint to Build
00:45 - The Goal: Building Your First Complete Application
01:30 - Project Brief: The Console To-Do List Manager
02:15 - Phase 1: The Blueprint (Planning Before Coding )
03:30 - Decomposing the Problem into Functions
04:45 - Phase 2: The Foundation (Choosing Your Data Structure)
06:00 - The Framework: Building the Main `while` Loop
07:15 - Phase 3: The User Experience (Good vs. Poor UX)
08:30 - Handling Invalid Input with `try-except`
09:45 - Phase 4: The Final Inspection (Testing Your Code)
11:00 - The Inspector's Checklist: Valid, Invalid, and Edge Cases
12:15 - Activity: Let's Build the To-Do App (Step-by-Step)
13:30 - Assessing Your Final Application
14:15 - Blueprints for Your Next Projects (Calculator & Guessing Game)
15:00 - The Master Architect's Toolkit
15:45 - Your Next Steps: Keep Building!