Python - Custom Exceptions
How can you create a hierarchy of custom exceptions where
DatabaseError inherits from ApplicationError, which inherits from Exception?How can you create a hierarchy of custom exceptions where DatabaseError inherits from ApplicationError, which inherits from Exception?
hard🚀 Application Q9 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand inheritance order for exception hierarchy
ApplicationError should inherit from Exception, DatabaseError from ApplicationError.Step 2: Check options for correct inheritance chain
class ApplicationError(Exception):\n pass\nclass DatabaseError(ApplicationError):\n pass correctly defines ApplicationError inheriting Exception, then DatabaseError inheriting ApplicationError.Final Answer:
class ApplicationError(Exception):\n pass\nclass DatabaseError(ApplicationError):\n pass -> Option CQuick Check:
Subclass inherits from parent exception class [OK]
Quick Trick: Subclass inherits from parent exception class [OK]
Common Mistakes:
MISTAKES- Reversing inheritance order
- Not inheriting from Exception at top level
- Omitting inheritance parentheses
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