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Creating Custom Exceptions

Learn how to handle Python errors and exceptions effectively. Fix common Python errors like SyntaxError, TypeError, and NameError with practical examples.

6. Creating Custom Exceptions

You can create your own exception classes by inheriting from Python’s built-in Exception class.

Example:

   class NegativeNumberError(Exception):
       pass

   def check_number(num):
       if num < 0:
           raise NegativeNumberError("Negative numbers are not allowed.")
       else:
           print("Number is valid.")

   try:
       check_number(-5)
   except NegativeNumberError as e:
       print(f"Error: {e}")