Asynchronous programming introduces new complexities, and error handling is one of the most critical. When you are running dozens of tasks concurrently, what happens if one of them fails? How do you prevent a single failure from crashing your entire application?
In the last article, we introduced the try...except block as the fundamental way to handle runtime errors in Python. It allows our programs to react to problems gracefully instead of crashing. However, the story doesn't end there. The full try statement includes two more optional but powerful clauses: else and finally.
Up to this point, our scripts have followed a "happy path." We assume the user will enter the correct type of data, the files we want to read will always exist, and we'll never divide by zero. But in the real world, things go wrong. Network connections fail, files are moved, and users enter invalid input.