Exception vs BaseException

Question

Accepted Answer

KeyboardInterrupt (Ctrl+C) and SystemExit both inherit from BaseException but not from Exception. That is intentional: catching Exception in a generic except clause does not accidentally swallow a user's attempt to quit your program. If you write except BaseException, you will also catch those signals and potentially trap the user in a loop they cannot exit. Use except Exception for broad error handling, and only catch KeyboardInterrupt or SystemExit explicitly when you have a specific reason to handle them.