Lesson 8.4: Advanced Error Handling and Logging

Introduction:
Advanced error handling and logging allow Python developers to monitor, debug, and maintain programs effectively. Proper error handling ensures program stability, while logging provides a record of runtime events for analysis and troubleshooting.

1. Advanced Exception Handling:

• Use multiple except blocks for different exceptions

• Use else for code to run if no exceptions occur

• Use finally for cleanup tasks

Example:

2. Raising Exceptions:

• Raise exceptions manually for input validation or logical errors

3. Logging in Python:

• Use the logging module to track events instead of print statements

• Supports different levels: DEBUG, INFO, WARNING, ERROR, CRITICAL

Example:

Output in app.log:

4. Practical Tips:

• Prefer logging over print statements for production applications

• Use different log levels to categorize messages

• Always handle exceptions to avoid program crashes

Learning Outcome of This Lesson:

• Implement advanced exception handling techniques

• Raise and manage custom exceptions

• Use Python’s logging module to monitor program events

• Build robust and maintainable Python applications