Year 11 - Computing
Records and dictionaries
Programming: dictionaries and data files
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit introduces pupils to the new data structures of records and dictionaries. They will develop a Caesar cipher encryption program using a dictionary as a cipher wheel. Pupils will explore how data can be read from and written to files and how this data can be used within a program.
Lesson Summary
You will learn to create a record using a dictionary in Python.
Key Notes
- Data structures are used to store data in an organised and accessible way.
- A record is an example of a data structure.
- A record allows you to store a collection of attributes for a single entity.
- Python does not have a native data structure for a record.
- Instead, you can use a different data structure called a dictionary to represent a record.
Vocabulary To Learn
- record: a collection of attributes for a single entity
- entity: an entity is a single object, place, person or thing
- attribute: properties or characteristics of an entity
- dictionary: a data structure that involves creating data pairings that can be located using a key
- key: used to identify each attribute held in the dictionary
Common Mistakes To Avoid
- There is no way to store multiple records in one data structure in Python.
3 Quick Questions (With Answers)
1. Describe the system or process from this lesson in clear steps.
Data structures are used to store data in an organised and accessible way. A record is an example of a data structure.
2. Define this computing term and give one practical example. 'record'
a collection of attributes for a single entity. Add one real device or system example to prove understanding.
3. Correct this common computing misconception.
Mistake: There is no way to store multiple records in one data structure in Python. Correction: If you want to use multiple records in a database, then you can add multiple dictionaries to a list.
More Lessons In This Unit
Browse all guides in the Year 11 Computing guide library.