KwickClips Python · 45 sec · free
Why did append give a nested list?
Short answer. append adds the whole list as one item.
How do you add many items separately?
Use extend().
Remember
| list(): builds a list |
| append: one item at the end |
| extend: many items |
| insert: at an index |
Append two items, get a nested list. Why? List of range of two builds zero and one. Append adds five, six as one item. Extend adds items separately. List builds a list. Append adds one. Extend adds many. Insert adds at an index.
This clip is from the full lesson: List Methods and Built-in Functions — 7 minutes, with the tables, the quick answers and the whole lesson in text.
Useful for: CBSE Class 11 Computer Science (083), CBSE Class 11 Computer Science (083), CBSE Class 11 Computer Science (083), CBSE Class 11 Computer Science Essentials (083)
More KwickClips from this lesson
![Code using remove, reverse, count, pop and index on the list [4, 6, 4, 1] with outputs.](/images/learn/clips/PY14-R2.webp)
What is the difference between remove() and pop()?46 sec
Why does print(marks.sort()) show None?40 sec![Code with bill = [40, 20, 60] printing min 20, max 60 and average 40.0.](/images/learn/clips/PY14-R4.webp)
How do you find an average without a loop?41 sec
Why did marks become None?41 secDisclaimer. KwickAcademy is free study material for general learning and revision. Parts of it, including the voice-over, are produced with the help of AI tools and may contain errors; if you spot one, please tell us and we will correct it. Syllabus, marks and exam details follow the latest official board publications available to us, and boards can change them at any time, so always confirm against your board's official website and your school. Using this material does not guarantee any marks or result. Board names and trademarks belong to their owners; Kwickprep is not affiliated with or endorsed by any examination board. We never ask for passwords, OTPs or ID numbers. Your progress is saved only in this browser. Full disclaimer · Privacy