ConnectionRefusedError — Intermediate Playground

Raised when a connection attempt is refused

Python Playground

# Exception chaining
class ApplicationError(Exception):
    pass

try:
    try:
        raise ConnectionRefusedError("connection refused")
    except ConnectionRefusedError as original:
        raise ApplicationError("Operation failed") from original
except ApplicationError as e:
    print(f"App error: {e}")
    print(f"Caused by: {e.__cause__}")

Output

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Exception chaining preserves the original error context, making debugging easier.

Challenge

Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?

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