Programming Challenge 💬 Challenge: Given a Python string. Find the longest substring for which holds that all of its characters are in alphabetical order so that the first character comes earlier in the alphabet than the second character, and so on. Here are three examples: string: ‘helloworld’, longest substring: ‘ellow’ string: ‘abcde’, longest substring: ‘abcde’ … Read more
Coding Challenge 💬 Challenge: Given a string. How to find all palindromes in the string? For comprehensibility, allow me to quickly add a definition of the term palindrome: 💡 Definition: A palindrome is a sequence of characters that reads the same backward as forward such as ‘madam’, ‘anna’, or ‘101’. This article wants to give … Read more
Problem: Given a dictionary and a filter condition. How to filter a dictionary by … … key so that only those (key, value) pairs in the dictionary remain where the key satisfies the condition? … value so that only those (key, value) pairs remain where the value satisfies the condition? In this tutorial, you’ll learn … Read more
Coding Challenge 💬 Challenge: Given a string. How to find the longest palindrome in the string? For comprehensibility, allow me to quickly add a definition of the term palindrome: 💡 Definition: A palindrome is a sequence of characters that reads the same backward as forward such as ‘madam’, ‘anna’, or ‘101’. This article wants to … Read more
Problem Formulation and Solution Overview This article will show you how to find the most common element in a NumPy Array. To make it more interesting, we have the following running scenario: Carrie heard that Creative Prints is hiring a Python coder. They require the interviewee to answer several coding questions: one is to provide … Read more
The most Pythonic way to convert a list of floats fs to a list of strings is to use the one-liner fs = [str(x) for x in fs]. It iterates over all elements in the list fs using list comprehension and converts each list element x to a string value using the str(x) constructor. This … Read more
In a previous post, I explained how AlphaZero can play Connect Four. If you haven’t already, you can read the first part here. In this part 2, I will share how to write the code for the Monte Carlo Tree Search to play Connect Four below. First, we will import our libraries and define our … Read more
In this article, we will introduce one of the core elements describing the mathematics of neural networks: tensors. 🧬 Although typically, you won’t work directly with tensors (usually they operate under the hood), it is important to understand what’s going on behind the scenes. In addition, you may often wish to examine tensors so that … Read more
Artificial neural networks have become a powerful tool providing many benefits in our modern world. They are used to filter out spam, to perform voice recognition, and are even being developed to drive cars, among many other things. As remarkable as these tools are, they are readily within the grasp of almost anyone. If you … Read more
AlphaGo was the first computer to beat Lee Sedol, who was considered the best Go player of the decade. Before AlphaGo, the strongest Go computer programs could only play Go at an amateur level. AlphaGo was further developed into AlphaZero, an AI that can master any game, including complex games like Shogi and Chess. Why … Read more
Factorial Definition and Example 💡 The factorial function n! calculates the number of permutations in a set. Say you want to rank three soccer teams Manchester United, FC Barcelona, and FC Bayern München – how many possible rankings exist? The answer is 3! = 3 x 2 x 1 = 6. Practical Example: Say, there … Read more
What You Need to Know Before You Begin I was trading forex bots long before I started learning Python. When I look back on the experience, I wish I had done it in reverse. There are three basic reasons: Learning to code with Python is easier. I know it’s hard to believe, but it’s true. … Read more