In this week's Python coding challenge, participants are tasked with creating an app that calculates the cost of operating an electrical device based on its wattage and the cost per kilowatt-hour (kWh). The basic requirement is to develop a command-line interface that allows users to input device wattage and kWh cost to calculate the hourly operating cost. For those seeking an added challenge, bonus features include transforming the app into a web application or a GUI using frameworks like TkInter, allowing users to input the number of usage hours, and incorporating persistent storage to track and display past queries. Participants are encouraged to focus on learning and problem-solving rather than the app's aesthetic appeal, with support available through instructional documents and community submissions via Pull Requests. The challenge emphasizes growth in Python skills and creativity in execution, with feedback welcomed for future challenges.