Python · Theory

Multiple exceptions

Theory

63/268

Multiple exceptions

One except can catch several types. except (TypeError, ValueError) as e: handles both. Or write two except blocks if the recovery is different. Order matters: catch the specific type before a wide parent like Exception, or the wide one steals the case.

Tuple form vs separate except — both valid. as e gives the message. Dry-run: int("Asha") is ValueError, 1 + "a" is TypeError. Same handler can print e for both.

Multiple exceptions — output — ValueError. int("Asha") cannot convert.

Diagram

try:  10 / 0
         │ ZeroDivisionError
         ▼
  except → Cannot divide
         │
         ▼
      finally

Exam tip

Show the tuple syntax once.

Example

# Multiple exceptions
try:
    int("Asha")
except (ValueError, TypeError) as e:
    print(type(e).__name__)

Multiple exceptions — output: ValueError. int("Asha") cannot convert.

Short notes

DefExcept (A, B)
RuleOr multiple except blocks
RememberOrder: specific first

Python · Theory

Multiple exceptions

← All stacks

Theory

63/268

Multiple exceptions

Tuple form vs separate except — both valid. as e gives the message. Dry-run: int("Asha") is ValueError, 1 + "a" is TypeError. Same handler can print e for both.

Multiple exceptions — output — ValueError. int("Asha") cannot convert.

Diagram

try:  10 / 0
         │ ZeroDivisionError
         ▼
  except → Cannot divide
         │
         ▼
      finally

Exam tip

Show the tuple syntax once.

Example

# Multiple exceptions
try:
    int("Asha")
except (ValueError, TypeError) as e:
    print(type(e).__name__)

Multiple exceptions — output: ValueError. int("Asha") cannot convert.

Short notes

DefExcept (A, B)
RuleOr multiple except blocks
RememberOrder: specific first

Multiple exceptions

Example

Short notes

Questions

Multiple exceptions

Example

Short notes

Questions