Introduction Exception handling is crucial for writing robust Python programs. Sometimes, an exception arises due to another underlying exception. In such cases, Exception Chaining allows us to link exceptions, making debugging easier by preserving the root cause of the error. Python achieves this using the raise ... from ... syntax, which explicitly links one exception to another. Why Use Exception Chaining? Improves Debugging: Helps trace the original cause of an error. Preserves Context: Maintains the complete error history. Better Error Messages: Gives detailed insights into exceptions. Exception Chaining Syntax Python supports exception chaining in two ways: Implicit Chaining (Automatically handled by Python) Explicit Chaining (Using raise ... from ...) 1. Implicit Exception Chaining When an exception occurs inside an except block, Python automatically chains it using the __cause__ attribute. Example: try: x = 1 / 0 # Raises ZeroDivisionError except ZeroDivisionError as e: raise ValueError("A higher-level error occurred") # Implicitly linked
