Why Define Custom Exceptions?
Custom exceptions are useful in the following scenarios:
- Clarity: They provide clear, specific error messages that are relevant to your application.
- Granularity: They allow for more fine-grained error handling, making it easier to pinpoint and address specific issues.
- Reusability: They can be reused across different parts of your application or even in different projects.
Define Custom Exceptions in Python
In Python, exceptions occur during the execution of a program that disrupts the normal flow of the program’s instructions. When an error occurs, Python raises an exception, which can be caught and handled using try
and except
blocks. Here’s a simple example of handling a built-in exception:
try:
result = 10 / 0
except ZeroDivisionError:
print("You cannot divide by zero!")
In this example, ZeroDivisionError
is a built-in exception that gets raised when you attempt to divide by zero.
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