You can check out the code for this article on our GitHub. Preamble This post is part 3 in continuation of our Smart Contract Security Series. This post is part of our Smart Contract Security Series: Ownership Exploit Private Variable Exploit Reentrancy Attack tx.origin Phishing Attack Denial of Service Attack Storage Collision Attack Randomness Attack … Read more
Problem Formulation and Solution Overview As a Python Coder, situations arise where you will need to apply a function against elements of a Series. To make it more fun, we have the following running scenario: Rivers Clothing does business with six (6) different countries. The Tax Rates for the associated countries have increased by 2%. … Read more
Problem Formulation and Solution Overview As a Python Coder, situations arise where you will need to apply a function against elements of a DataFrame Column. To make it more fun, we have the following running scenario: You have a DataFrame containing user information (including the column Recurring). This column is the Monthly Fee for a … Read more
[toc] Problem Statement: How to define a method outside of class definition in Python? Example: Can we create foo() outside of the class definition or maybe even in another module? Introduction We all know Python is an object-oriented programming language, and in Python, everything is an object including properties and methods. In Python, the class … Read more
Microsoft Excel is a cross-platform and battle-tested spreadsheet software widely used for data analysis and visualization. It is a powerful and user-friendly tool indeed! But how can we bring it to the next level? We can combine Excel with Python to read data from Excel, save data to Excel with formats, formulas, and even charts, … Read more
A Python list is a collection of objects that are indexed, ordered, and mutable. There are several different ways to delete a list item. We’ll first look at how we can delete single items from a list. And then finish with removing multiple objects. Method 1 – remove() Python list.remove() is a built-in list method … Read more
Before we learn about the money, let’s get this question out of the way: What Is Docker? Let’s have a look at the definition from the official Docker website: “Docker takes away repetitive, mundane configuration tasks and is used throughout the development lifecycle for fast, easy and portable application development – desktop and cloud. Docker’s … Read more
Before we learn about the money, let’s get this question out of the way: What Is Yarn? Let’s have a look at the definition from the official Yarn website: “Yarn is a package manager that doubles down as project manager. Whether you work on one-shot projects or large monorepos, as a hobbyist or an enterprise … Read more
Before we learn about the money, let’s get this question out of the way: What Is Deno? Let’s have a look at the definition from the official Deno website: “Deno is a simple, modern and secure runtime for JavaScript and TypeScript that uses V8 and is built in Rust.” Now that you know about what … Read more
Overview Problem: How to choose a file starting with a given string? Example: Consider that we have a directory with files as shown below. How will you select the files starting with “001_Jan“? Python Modules Cheat Sheet To Choose A File Starting With A Given String Choosing a file starting with a given string is … Read more
Before we learn about the money, let’s get this question out of the way: What Is Puppet? Let’s have a look at the definition from this Puppet website (highlights be me): “Puppet is an open source software configuration management and deployment tool. It’s most commonly used on Linux and Windows to pull the strings on … Read more
Before we learn about the money, let’s get this question out of the way: What Is Ansible? Let’s have a look at the definition from the official Ansible website: “Red Hat® Ansible® Automation Platform is a foundation for building and operating automation across an organization. The platform includes all the tools needed to implement enterprise-wide … Read more