PYTHON APPEND VS EXTEND: THE MISTAKE EVERYONE MAKES! 🛑 | VYOM TECH
Lists are boring if they stay empty! Today, we learn how to fill them up dynamically. Welcome to Day 8 of our Python Series.
The biggest confusion for beginners is knowing WHEN to use .append() and WHEN to use .extend(). One adds a single item, while the other merges two lists together. If you get this wrong, you end up with a "List inside a List" (Nested List), which can break your code!
We also cover .insert(), which lets you sniper-drop an item exactly where you want it.
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In this video, we cover:
0:00 - Intro: Dynamic Lists (Lists that grow)
1:30 - The most common method: .append()
3:15 - Adding at a specific spot: .insert(index, value)
5:00 - The Big Debate: .append() vs .extend()
7:30 - Visualizing the Difference (Nested vs Merged)
9:00 - Performance Tip: Which is faster?
💻 Tools & Resources:
• Code Editor: Replit (Online Python Editor) - https://replit.com/
💡 Challenge of the Day:
Start with an empty list: `my_cart = []`
1. Add "Apple" using append.
2. Add "Banana" at the START using insert.
3. Add a list `["Milk", "Bread"]` using extend.
Print the final list! It should look like: `['Banana', 'Apple', 'Milk', 'Bread']`
Paste your code below! 👇
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⚠️ DISCLAIMER:
This video is strictly for educational and informational purposes. The code and techniques demonstrated are intended for learning and experimentation.
While every effort has been made to ensure accuracy, Vyom Tech and its creators are not responsible for any errors, omissions, or damages arising from the use of this information. Please use this code at your own risk and test thoroughly before using it in any production environment.
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