Build Website with Flask – Part 4

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This is part of our Flask series: Build Website with Flask – Part 1 Build Website with Flask – Part 2 Build Website with Flask – Part 3 Build Website with Flask – Part 4 Build Website with Flask – Part 5 Build Website with Flask – Part 6 Build Website with Flask – Part … Read more

How to Fix “ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()”

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Here’s an error I recently encountered when working with NumPy arrays: If you run the following code, you’ll experience a special ValueError: The output will be this error message: How can you fix this error? I’ll give you a short and a long answer to this question. Let’s start with the short one: Solution: Use … Read more

Python Map to Int

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Problem Formulation Convert a string list to an integer list using the map() function. Example: Input: [‘1’, ‘2’, ‘3’] Output: [1, 2, 3] Input: [’42’] Output: [42] Input: [‘-1’, ‘-2’, ‘-3’] Output: [-1, -2, -3] Solution Using Map To convert a list of strings to a list of integers, you can “map to int” by … Read more

Python os.walk() – A Simple Illustrated Guide

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According to the Python version 3.10.3 official doc, the os module provides built-in miscellaneous operating system interfaces. We can achieve many operating system dependent functionalities through it. One of the functionalities is to generate the file names in a directory tree through os.walk(). If it sounds great to you, please continue reading, and you will … Read more

¿Cómo convertir una lista en un array de NumPy?

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Para convertir una lista de Python en un array de NumPy, usa cualquiera de los siguientes dos métodos: La función np.array() que toma un iterable y devuelve un array de NumPy creando una nueva estructura de datos en memoria. La función np.asarray() que toma un iterable como argumento y lo convierte al array. La diferencia … Read more

If Sin Else en una Línea de Python

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Crear hermosas sentencias de una línea en Python es tanto un arte como una ciencia. En este tutorial, aprenderás a comprimir una sentencia if sin una cláusula else en una sola línea de código de Python. Problema: ¿Cuál es el equivalente de una sola línea de la sentencia if simple sin una cláusula else? Aquí … Read more

Cómo determinar el tipo de un objeto en Python

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Planteamiento del problema Cada objeto de Python es de un cierto tipo, también llamado “clase”. La clase es un esquema que muestra los datos y capacidades de cada objeto/instancia que se crea a partir de este esquema. Dado un objeto de Python (=instancia). ¿Cómo determinar/comprobar/obtener su tipo (=clase)? Hay muchas variantes de esta pregunta: Cómo … Read more

Spring Developer – Income and Opportunity

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Before we learn about the money, let’s get this question out of the way: What Is Spring? Let’s have a look at the definition from the official website (highlights by me): “The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications – on any kind of deployment platform. A key … Read more

Angular Developer – Income and Opportunity

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Before we learn about the money, let’s get this question out of the way: What Is Angular? Let’s have a look at the definition from the official website (highlights by me): “Angular is a web development platform, built on TypeScript. […] With Angular, you’re taking advantage of a platform that can scale from single-developer projects … Read more

Django Developer – Income and Opportunity

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Before we learn about the money, let’s get this question out of the way: What Is Django? Let’s have a look at the definition from the official website (highlights by me): “Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. Built by experienced developers, it takes care of much … Read more