Year 9 - Computing
Python list operations
Python programming with sequences of data
Study Hub
Study Guides
This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
In this unit pupils will discover how data is represented and processed in sequences, such as lists and strings. They will cover a spectrum of operations on sequences of data, that range from accessing an individual element to manipulating the entire sequence though real world practical activites.
Lesson Summary
You will learn to add and remove items and sort data held in a list.
Key Notes
- List methods can be used to perform operations on lists such as to add, remove and insert items.
- A list is a dynamic data structure, meaning the length of a list is the number of values it currently stores.
- A list can be sorted using a list method to aid processing.
Vocabulary To Learn
- append: adding to an existing data structure
- remove: taking an item away from an existing data structure
- sort: arranging data into a meaningful order
- list method: a built-in function that will perform an operation on a list
Common Mistakes To Avoid
- Once an item is added to a list it is fixed in to the structure of the list and it cannot be altered.
3 Quick Questions (With Answers)
1. Describe the system or process from this lesson in clear steps.
List methods can be used to perform operations on lists such as to add, remove and insert items. A list is a dynamic data structure, meaning the length of a list is the number of values it currently stores.
2. Define this computing term and give one practical example. 'append'
adding to an existing data structure. Add one real device or system example to prove understanding.
3. Correct this common computing misconception.
Mistake: Once an item is added to a list it is fixed in to the structure of the list and it cannot be altered. Correction: Items can be removed, inserted and amended in a list using list methods. These methods change the structure of the list. Values of items can also be updated.
More Lessons In This Unit
Browse all guides in the Year 9 Computing guide library.