Try / Except / Finally in Python

From the Python cheat sheet · Error Handling · verified Jul 2026

Try / Except / Finally

Catch and handle exceptions gracefully.

python

try:
    result = 10 / 0
except ZeroDivisionError:
    print("Cannot divide by zero")
except (TypeError, ValueError) as e:
    print(f"Error: {e}")
else:
    print("Success")        # Only runs if no exception
finally:
    print("Always runs")    # Cleanup

💡 Use specific exception types — bare "except:" catches everything including KeyboardInterrupt

⚡ The else block runs only when no exception occurs — great for success logic

📌 Use "raise" without arguments to re-raise the current exception

🟢 Custom exceptions should inherit from Exception, not BaseException

exceptionstryexcepterror-handling

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