Python has list comprehension and dictionary comprehension as a concise way to create a list or a dictionary by modifying an existing iterable. Python also has generator expressions that allow you to create an iterable by modifying and potentially filtering each element in another iterable and passing the result in a function, for instance. Does … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to check a List for Duplicates in Python. To make it more fun, we have the following running scenario: The Finxter Academy has given you an extensive list of usernames. Somewhere along the line, duplicate entries were added. They need you to check if … Read more
Problem Statement Create a tuple from user input in Python. Create a set from user input in Python. How to take Set as an Input from the User? Method 1: Using a Set Comprehension Approach: The simplest way to take a set as an input from the user is to use a set comprehension. Set … Read more
This is a simple algorithm to find all the powersets of a given set. If you feel like you need to refresh your Python set skills, have a look at my complete guide to Python sets (with Harry Potter examples). Problem Formulation: Powerset What is the powerset of a given set s? The powerset is … Read more
Problema: Se dan dos listas l1 y l2. Quieres realizar una de las siguientes acciones: 1. Comparación booleana: comparar las listas por elementos y devolver True si la métrica de comparación devuelve True para todos los pares de elementos y False en caso contrario. 2. Diferencia: encontrar la diferencia entre los elementos de la primera … Read more
Problem Formulation Given a set of elements. If you print the list to the shell using print({1, 2, 3}), the output is enclosed in curly brackets (braces) like so: {1, 2, 3}. But you want the set without brackets like so: 1, 2, 3. How to print the set without enclosing brackets? Method 1: Unpacking … Read more
Do you need to create a function that returns a set but you don’t know how? No worries, in sixty seconds, you’ll know! Go! ? A Python function can return any object such as a set. To return a set, first create the set object within the function body, assign it to a variable your_set, … Read more
Have you stumbled upon the strange-looking Python operator A |= B in a code snippet and you don’t know what it means? This article will clarify it once and for all! Let’s start with the short answer: Python’s A |= B applies the | operator in place. Thus, it is semantically identical to the longer-form … Read more
The set data structure is one of the most underused primary data structures in Python. I’ve seen so many intermediate-level coders who use lists when all they need is a data structure that checks membership!! ? Understanding the basics differentiates the good from the great. In this tutorial, you’ll learn about Python’s basic set methods. First, … Read more
Python’s S.symmetric_difference(T) method creates and returns a new set containing all elements that are in exactly one of the two sets S and T. Here’s a minimal example where we return a new set containing the elements 1 and 4 that are in exactly one of the two sets s and t. Here’s another visual … Read more
Python’s set.remove(x) method removes an element x from this set if it is a member, otherwise it raises a KeyError. Here’s a minimal example where you remove the string element ‘Bob’ from the set by means of the s.remove() method: Syntax Let’s dive into the formal syntax of the set.remove() method. set.remove(element) Argument Data Type … Read more
This article gives you everything you need to know about sets in Python. To make it a bit more fun, I have used Harry Potter examples throughout the article. What is a Python Set? The set data structure is one of the basic collection data types in Python and many other programming languages. In fact, … Read more