for i j in python The Python expression for i, j in XXX allows you to iterate over an iterable XXX of pairs of values. For example, to iterate over a list of tuples, this expression captures both tuple values in the loop variables i and j at once in each iteration. Here’s an example: … Read more
As you know, Web3 is a new online era that differs from Web2 in its foundational technology, the blockchain. Blockchain is a disruptive technology characterized by being a decentralized solution for communication and transactions. Decentralization means that there are no controlled databases by third-party service providers. These providers can own and hold your accounts or … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to extract specific columns or a sub-set thereof from a NumPy array in Python. Often, a sub-set of data needs to be extracted from a larger dataset. This sub-set could be a pre-determined number of column(s) or row(s). These examples show you how to … Read more
Problem Formulation 💬 Challenge: How to design a regular expression pattern that matches whitespace characters such as the empty space ‘ ‘ and the tabular character ‘\t’, but not the newline character ‘\n’? An example of this would be to replace all whitespaces (except newlines) between a space-delimited file with commas to obtain a CSV. … Read more
Problem Formulation You appear at an interview, and the interviewer intends to test your skills in writing concise one-line solutions. So he decides to present you with a long and complex-looking piece of code that is seemingly intimidating and asks you to come up with one-line solutions for the given code. Given: Challenges: Guess the … Read more
The easiest way to convert a space-delimited file to a comma-separated values (CSV) file is to use the following three lines of code: import pandas as pd df = pd.read_csv(‘my_file.txt’, sep=’\s+’, header=None) df.to_csv(‘my_file.csv’, header=None) We’ll explain this and other approaches in more detail next—scroll down to Method 3 for this exact method. Problem Formulation Given … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to repeat a string multiple times in Python. Over your career as a Python coder, you will encounter situations when a string needs to be output/displayed a specified number of times. The examples below offer you various ways to accomplish this task. 💬 Question: … Read more
In this article, we’ll be learning about something that is literally everywhere. Whatever corner you turn, whatever street you run down, you can’t get away from it. It is as ubiquitous as the physical space around us. Yes today, we’re talking about… TIME. More specifically, we’re talking about NumPy’s functions that represent dates and times. … Read more
Wrong Way to Create and Initialize a List of Lists in Python A standard way to initialize a flat list in Python is the multiplication operator to create a new list by repeatedly concatenating an existing list: 🌍 Related Tutorial: How to create a list in Python? Consequently, many beginner coders try to use the … Read more
This course will show you the ins and outs of decentralized finance (DeFi). Each step links to a more detailed article/tutorial, so you can dive deeper into the rabbit hole. Let’s get started! Step 1: Getting Started with DeFi What is DeFi? Decentralized Finance, also referred to as “DeFi,” enables customers to access financial services … Read more
This is in continuation of the first part of our DeFi series. 💡 Abstract: In this article, we will see how decentralized lending and borrowing work. It starts with comparing centralized finance (CeFi) with decentralized finance (DeFi) lending and borrowing. You’ll then learn about the most important Ethereum based DeFi decentralized apps (dapps) for lending … Read more
Artificial neural networks have become a powerful tool providing many benefits in our modern world. They are used to filter out spam, perform voice recognition, play games, and drive cars, among many other things. As remarkable as these tools are, they are readily within the grasp of almost anyone. If you have technical interest and … Read more