Howto

💡 Problem Formulation: Python developers typically use the built-in len() function to find the length of a list. However, understanding alternative methods can improve one’s grasp of Python’s iterators and loops. This article aims to elucidate how to find the length of a given list, such as my_list = [1, 2, 3, 4], where the … Read more

💡 Problem Formulation: Given a list of numbers in Python, the task is to calculate the sum of all the odd numbers contained within it. For example, if the input is [1, 2, 3, 4, 5], the expected output is 9, since 1 + 3 + 5 = 9. Method 1: Using for-loop and Modulus … Read more

How to Reverse a List with List Slicing in Python 💡 Problem Formulation: How can a list in Python be reversed in place without using built-in functions? Given an input list [1, 2, 3, 4, 5], the desired output is a list in reversed order: [5, 4, 3, 2, 1]. This article demonstrates five ways … Read more

💡 Problem Formulation: When programming in Python, you may encounter scenarios where you need to generate a sequence of numbers from 1 to n as a list. This task forms the basis of many algorithms and is handy for generating test data, iterating over loops, numerical computations, and more. For example, if the input is … Read more

💡 Problem Formulation: You have a collection of height measurements but they include duplicate entries for individuals. Our goal is to compute the average height per individual, then, using only the distinct data points, to calculate the overall average height. Imagine input as a list of tuples ((‘Name’, Height_in_cm)), and the desired output is a … Read more

💡 Problem Formulation: Python developers often need to retrieve elements from a list based on their indexes. Specifically, you may need a way to extract only the items that are positioned at even indexes within a list. For instance, given the input list [3, 7, 2, 8, 5, 10], the desired output would be [3, … Read more

💡 Problem Formulation: This article addresses the conversion of complex numbers, which are expressed as a combination of a real and an imaginary part (a + bi), into polar coordinates, which represent the same number as a radius (r) and an angle (θ). For example, converting the complex number 3 + 4i should result in … Read more

💡 Problem Formulation: You have a collection of elements and multiple sets. The goal is to determine the ‘happiness’ of the collection based on the presence of its elements in two specific sets: a ‘happy’ set and a ‘sad’ set. For each element in the collection that is in the happy set, happiness increases by … Read more

💡 Problem Formulation: When dealing with mathematical relations, specifically functions, it is crucial to distinguish whether a given set of ordered pairs (domain and range) forms a function. A set forms a function if each element in the domain maps to exactly one element in the range. In Python, this can be programmatically verified. Imagine … Read more

💡 Problem Formulation: The task is to find the angle at the base of a right-angled triangle, using the midpoint of the hypotenuse as one vertex and the ends of the base as the other vertices. The input would typically be the lengths of the sides of the triangle, and the output is the angle … Read more

💡 Problem Formulation: Given a condition or a set of conditions, the task is to calculate a function from an indicator random variable in Python. The indicator random variable is a function that maps an outcome to 1 if the condition is true and 0 otherwise. For example, we might want to compute the sum … Read more

💡 Problem Formulation: Often in programming, it is essential to understand the various numerical representations of data. This article addresses the problem of efficiently generating and displaying the decimal, octal, hexadecimal, and binary formats for the first N natural numbers. For instance, if the input is N = 5, the desired output is a list … Read more