Answered: Assume a dictionary with some values:…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Assume a dictionary with some values:

students = { 'CCU101': ['Anna', 88.5, 98.5, 78, 85, 92.5], '

CCU102': ['Alex', 98,91,90,92,88],

'CCU103': ['Bob', 99.5, 98.5, 96, 96, 89.5], }

To access, a specific row, you would use students[key][column_number].

students['CCU101'][0] would print 'Anna'
students['CCU101'][1] would print 88.5

and so on..

Write a program that defines a function that takes a dict as an argument, adds the scores of each student, calculate average for each student, and display them.

Define a function display_average(students) that takes in a dictionary as an argument. Display the original dictionary. Calculate and display the average of each student.
You do not need to ask user for input. You can use your own dictionary with at-least 5 rows.

### Understanding Dictionaries in Python

Assume a dictionary with some values:

```python
students = {
'CCU101': ['Anna', 88.5, 98.5, 78, 85, 92.5],
'CCU102': ['Alex', 98, 91, 90, 92, 88],
'CCU103': ['Bob', 99.5, 98.5, 96, 96, 89.5],
}
```

To access a specific row, you would use `students[key][column_number]`.

- `students['CCU101'][0]` would print `'Anna'`
- `students['CCU101'][1]` would print `88.5`

### Explanation

This code snippet demonstrates how to organize and access data using Python dictionaries and lists. Each student is represented by a key, such as `'CCU101'`, and their associated values are stored in a list. The first item in the list is the student's name, and the subsequent numbers are their grades.

### Key Points

- **Dictionary**: A collection of key-value pairs. Keys are unique identifiers in this example.
- **List**: An ordered sequence of items. Each student has a list comprising their name and grades.
- **Accessing Data**: Use the key to find the student and the index to find specific information (e.g., name or grade).

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