NumPy is a popular Python library for data science for array, vector, and matrix computations. This puzzle introduces basic indexing of elements in NumPy arrays. Problem Formulation: How to index elements in NumPy arrays? Indexing 1D Arrays with Positive Indices The most simple use of indexing is with the square bracket notation and positive integers: … Read more
Problem Formulation: How to calculate the standard deviation in NumPy? Differentiations: There are many different variants of this problem: Calculate the standard deviation of a 1D array Calculate the standard deviation of a 2D array Calculate the standard deviation of a 3D array Then you can also calculate the standard deviation along an axis: Calculate … Read more
Python is one of the most popular programming language according to a recent IEEE Spectrum article. In this article, we compiled the best resources to learn Python for you— whether you’re a beginner, intermediate, or professional Python developer. ALL LINKS OPEN IN A NEW TAB! Python and Computer Science Puzzles Cheat Sheets Online Tutorials Online … Read more
Python has several built-in data structures such as Lists, Sets and Dictionaries (check out the articles!).In this article, you’ll learn everything you need to know about tuples including real world examples. A Python tuple is an immutable, ordered, and iterable container data structure that can hold arbitrary and heterogeneous immutable data elements. Tuple Motivating Example … Read more
Do you want to earn money as a Python freelancer? But you just start out learning Python? This article leads you step-by-step through the adventure of becoming a Python freelancer. Learn about the exact steps you need to do to become a Python freelancer – starting out as a Python newbie. Without losing any time, let’s dive into the 7 steps of becoming a Python freelancer.
Python comes with several built-in data types. These are the foundational building blocks of the whole language. They have been optimised and perfected over many years. In this comprehensive tutorial, we will explore one of the most important: the dictionary (or dict for short). For your convenience, I’ve created a comprehensive 8000-word eBook which you … Read more
Did you already try to sort a list of tuples? And when you saw the result, it wasn’t quite what you expected? Well, this happened to me when I went deeper into Python, and I suppose it also happened to you since you are looking for a solution. To me, this shows that you are … Read more
Python cheat sheets are the 80/20 principle applied to coding: learn 80% of the language features in 20% of the time.Download and pin this cheat sheet to your wall until you feel confident using all these tricks. Download PDF for Printing Try It Yourself: Exercise: Modify each function and play with the output! Here’s the … Read more
Slicing is a concept to carve out a substring from a given string. Use slicing notation s[start:stop:step] to access every step-th element starting from index start (included) and ending in index stop (excluded). All three arguments are optional, so you can skip them to use the default values (start=0, stop=len(lst), step=1). For example, the expression … Read more
A code puzzle is an educative snippet of source code that teaches a single computer science concept by activating the learner’s curiosity and involving them in the learning process.
Too much stuff happening in a single plot? No problem—use multiple subplots! This in-depth tutorial shows you everything you need to know to get started with Matplotlib’s subplot() function. If you want, just hit “play” and watch the explainer video. I’ll then guide you through the tutorial: To create a matplotlib subplot with any number … Read more
You can play with the following interactive Python code to calculate the variance of a 2D array (total, row, and column variance). Here’s another practical example: What is the output of this puzzle?*Advanced Level* (solution below) Numpy is a popular Python library for data science focusing on arrays, vectors, and matrices. This puzzle introduces a … Read more