Logging

In the previous tutorial, we learned about databases with SQLite and SQLAlchemy. Now let’s learn about logging and debugging — the professional way to understand what your program is doing. If you still use print() to debug your code, this tutorial is for you. By the end, you will know how to use Python’s logging module, debug with breakpoint(), and profile your code. Why print() is Not Enough Every beginner uses print() for debugging: ...

Your app will crash. The network will fail. The server will return unexpected data. The database will be empty when it should not be. The question is not if errors happen — it is how you handle them. Good error handling makes the difference between an app that shows a helpful message and an app that shows a blank screen. In KMP, you need error handling that works on every platform. No Android-specific exceptions, no iOS-specific patterns. Shared error handling for shared code. ...