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Module 9
Master Error Handling: Exceptions and Logging
1
Creating Custom Exceptions
Define custom exception classes that inherit from `Exception` to represent domain-specific errors.
2
Raising Built-in Exceptions
Raise specific, appropriate built-in exceptions like `ValueError`, `TypeError`, or `KeyError`.
3
Targeted Exception Handling
Catch specific exceptions narrowly and avoid using bare `except:` or overly broad `except Exception:`.
4
Chaining Exceptions for Enhanced Debugging
Chain exceptions with `raise ... from` to preserve the original traceback and provide debugging context.
Python Logging: Beyond Print Statements
Configure the `logging` module with levels, handlers, and formatters to replace `print()` for diagnostics.
6
Structured Logging for Production
Implement structured (e.g., JSON) logging for easier parsing and analysis in production environments.
7
Assertions vs. Exceptions: When to Use Which
Distinguish between `assert` for internal sanity checks during development and exceptions for validating external inputs.
Guaranteed Cleanup: `finally` vs. `with`
Compare the use of `finally` and context managers (`with`) for guaranteeing resource cleanup.
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Embrace Clarity: Pythonic Type Hinting