Cursos /

Python Data Structures

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

Nested List

Challenge: Create a List

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

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

Delete a Tuple

Update a Tuple

Adding Items

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.

Creating a Set

Add() Method

Update() Method

Accessing the Elements of a Set

Remove() and Discard() Methods

Clear() Method

Pop() Method

Dictionaries also have a pop() method that removes a key-value pair by its key and returns its value. If the specified key isn't found in the dictionary, a KeyError exception is raised.

The syntax is:

In the following example, a KeyError exception will be raised since the dictionary does not contain the key 'guava'.

Tarea

Consider this dictionary:

You need to remove the entries with the keys 1, 5, and 6 using the pop() method.

¿Todo estuvo claro?

Sección 2. Capítulo 6

Pop() Method

Dictionaries also have a pop() method that removes a key-value pair by its key and returns its value. If the specified key isn't found in the dictionary, a KeyError exception is raised.

The syntax is:

In the following example, a KeyError exception will be raised since the dictionary does not contain the key 'guava'.

Tarea

Consider this dictionary:

You need to remove the entries with the keys 1, 5, and 6 using the pop() method.

¿Todo estuvo claro?

Sección 2. Capítulo 6