This article continues on the Solidity Smart Contract Examples series, which implements a somewhat more complex process of a blind auction. 🌍 Recommended Tutorial: Smart Contracts with Solidity — Crash Course Here, we’re walking through an example of a blind auction (original source). We’ll first lay out the entire smart contract example without the comments … Read more
Minimal Error Example Given the following minimal example where you create a set and attempt to access an element of this set using indexing or slicing: If you run this code snippet, Python raises the TypeError: ‘set’ object is not subscriptable: Why Does the Error Occur? The Python TypeError: ‘set’ object is not subscriptable occurs … Read more
Problem Formulation and Solution Overview This article will show you how to add days to a Pandas DataFrame Date column. To make it more interesting, we have the following running scenario: CheckersTV is a new channel offering streaming news and games. They have a large subscriber base, each paying a monthly fee of $12.99. For … 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
Given an image as a .png or .jpeg file. How to convert it to a CSV file in Python? Example image: Convert the image to a CSV using the following steps: Read the image into a PIL.Image object. Convert the PIL.Image object to a 3D NumPy array with the dimensions rows, columns, and RGB values. … Read more
Problem Formulation and Solution Overview This article will show you how to find the most common element in a Python Dictionary. However, since all Dictionary Keys are unique, this article focuses on searching for the most common Dictionary Value. To make it more fun, we have the following running scenario: Marty Smart, a Math Teacher … Read more
This article continues on the series we started the last time: Solidity smart contract examples, which implement a simplified real-world process. Here, we’re walking through an example of a simple open auction. 🌍 Original Source Code: Solidity Docs We’ll first lay out the entire smart contract example without the comments for readability and development purposes. … Read more
Problem Formulation and Solution Overview This article will show you how to find the most common element in a Pandas Column. To make it more interesting, we have the following running scenario: You have been provided with a downloadable CSV file containing crime statistics for the San Diego area, including their respective NCIC Crime Codes. … Read more
Problem Formulation Consider the following minimal example where a TypeError: ‘float’ object is not subscriptable occurs: This yields the following output: Solution Overview Python raises the TypeError: ‘float’ object is not subscriptable if you use indexing or slicing with the square bracket notation on a float variable that is not indexable. However, the float class … 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
Problem Formulation and Solution Overview This article will show you how to find the most common element in a Python string. To make it more interesting, we have the following running scenario: Sven, a Photographer, turned Python Coder, was called for an interview at Edge IT. Sven thought the interview was going well until he … Read more
Do you encounter the following error message? TypeError: NoneType is not subscriptable You’re not alone! This short tutorial will show you why this error occurs, how to fix it, and how to never make the same mistake again. So, let’s get started! Summary Python raises the TypeError: NoneType is not subscriptable if you try to … Read more