ReactCHALLENGES

5. Multiple except

A single try can have several except blocks. Python checks them from top to bottom and runs the first one whose type matches:

  • Write one except line per exception type you want to handle.
  • For a given error, only one handler runs.
  • Order matters: put more specific handlers before broader ones. Exception matches almost everything, so it goes last.
  • If no handler matches, the exception is not caught and the program stops.

Coming from JavaScript? JavaScript usually has a single catch; Python lets you write one typed handler per expected error.

#01

Add a second except

Use try with int("abc") inside. Add an except ValueError block that prints Not a number and an except ZeroDivisionError block that prints Cannot divide by zero. The ValueError handler runs.

Print exactly:

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#02

Catch the second error

Use the same two handlers, but put print(10 / 0) inside try. The division raises ZeroDivisionError, so its handler prints Cannot divide by zero.

Print exactly:

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#03

Only the first matching handler runs

Use try with int("oops") inside. Add except ValueError that prints Bad value, then except Exception that prints Something else. ValueError matches the first handler, so the second one is skipped.

Print exactly:

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#04

Handle two errors in a function

Define parse_and_divide(text) that returns 10 / int(text) from inside a try block. Add except ValueError that returns Not a number and except ZeroDivisionError that returns Cannot divide by zero. Print parse_and_divide("2"), then parse_and_divide("x"), then parse_and_divide("0").

Print exactly:

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