Module 25: Advanced Exception Handling

Handling multiple errors, using `else` and `finally`.

Anatomy of Full Handling

Now let's look at the full structure including `else` and `finally`. Click each part.

try: operation() except ValueError as e: print("Value Error Handler") except TypeError: print("Type Error Handler") else: print("Success! No errors.") finally: print("Cleanup code runs always.")

Identify all 15 parts!

Predict the Execution Flow

Consider the `else` and `finally` blocks. What sequence of messages will be printed? Choose the correct output.

Refine Generic Handling

Using a broad `except Exception:` can hide bugs. Refine the code below to catch `ValueError` and `TypeError` specifically, each printing a distinct message. Add an `else` block to print "Conversion successful!" if no error occurs.

Goal: Replace `except Exception:` with specific handlers for `ValueError`, `TypeError`, and add an `else` block for success.
Refinement check results appear here...

Build the Handling Structure

Drag the code blocks from the top into the correct zones below (`try`, `except`, `else`, `finally`) to build a logical error handling structure.

Drop `try` code here...
Drop `except` handler here...
Drop `else` code here...
Drop `finally` code here...

Advanced Mini Missions

Combine your skills! Use multiple handlers, `else`, and `finally`.

Mission 1: File Handling Simulation

Simulate opening and reading a file. Use `try`. Catch `FileNotFoundError` (print "File not found.") and `PermissionError` (print "Permission denied."). Use `finally` to always print "File operation finished.".

Mission 2: Robust Division Calc

Get two inputs (numerator, denominator). Convert both to floats. Catch `ValueError` for invalid inputs (print "Invalid number."). Catch `ZeroDivisionError` (print "Cannot divide by zero."). Use `else` to print the division result ONLY if both conversions and the division are successful.

Advanced Practice Complete!

Superb work! You've mastered more complex exception handling techniques.
Feel free to review the video lesson or head back to the course menu.