Python Data Structures

Python Data Structures

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1. List

What is a list? A list is an ordered collection that can be modified. It also allows for duplicate elements.

Creating a List

Challenge: Create a List

Lists Are Mutable

Append() Method

Insert() Method

Deleting Elements

Removing Elements

List Comprehensions

2. Dictionary

What is a dictionary? A dictionary is an ordered collection that can be changed, but it doesn't allow duplicate entries. It consists of `key:value` pairs, which are used to optimize its structure.

Creating a Dictionary

Challenge: Craft the Dictionary

Extraction of Information

Popitem() Method

Dictionary Comprehensions

3. Tuple

What is a tuple? A tuple is an ordered collection that cannot be altered. It can have duplicate elements. While it's similar to a list, the values in a tuple can be of any type and are indexed by integers. Although not mandatory, it's common to enclose the values of a tuple in parentheses, making them easier to understand in Python.

Creating a Tuple

Accessing Elements of a Tuple

Concatenation of Tuples

Challenge: Concatenate Tuples

4. Set

What is a set? In Python, a `set` is an unordered collection that is both `iterable` and `mutable`, with no repeated elements. While the order of items in a set isn't fixed, it can include a variety of elements. A key benefit of using sets over lists is their highly efficient method for determining if an element exists within the set.

Update() Method

Accessing the Elements of a Set

Remove() and Discard() Methods

Extraction of Information

Let's build a dictionary called student.

This dictionary includes three key-value pairs:

Key	Value
`'first name'`	`'Ann'`
`'last name'`	`'Elliot'`
`'city'`	`'New York'`

In the dictionary, you can retrieve an item using its key. Here's an example.

In the code provided, Python searches for the value associated with the 'city' key in the student dictionary and assigns this value to the city_of_student variable.

Time to get hands-on!

Task

You're working with the following dictionary:

Display the values for the keys Turkey and Malta.

Everything was clear?

Section 2. Chapter 3

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Extraction of Information

Let's build a dictionary called student.

This dictionary includes three key-value pairs:

Key	Value
`'first name'`	`'Ann'`
`'last name'`	`'Elliot'`
`'city'`	`'New York'`

In the dictionary, you can retrieve an item using its key. Here's an example.

In the code provided, Python searches for the value associated with the 'city' key in the student dictionary and assigns this value to the city_of_student variable.

Time to get hands-on!

Task

You're working with the following dictionary:

Display the values for the keys Turkey and Malta.

Everything was clear?

Section 2. Chapter 3

toggle bottom row

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