Explore the journey of creating Mu, a native code editor written in Python, in this EuroPython 2019 conference talk. Delve into the challenges faced by an international team of volunteers, including cross-platform GUI development, packaging solutions, interactive visual debugging, and integration with various frameworks and devices. Learn about the decision-making process, technical research, and implementation details behind Mu's development. Gain insights into addressing accessibility, internationalization, and community-building aspects of the project. Discover valuable lessons from the team's experiences, mistakes, and solutions as they aimed to create a simple yet powerful code editor for beginners and experienced developers alike.