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title: understanding python class exception handling
introduction:
exception handling is a crucial aspect of writing robust and error-tolerant python code. while python provides built-in exceptions for handling various types of errors, you can also create your own custom exceptions using classes. this tutorial will guide you through the process of creating and using custom exception classes in python.
to create a custom exception class, you need to inherit from the base exception class. let's create a simple custom exception called customerror:
in this example, we have defined a custom exception class named customerror that inherits from the built-in exception class. the _init_ method is used to initialize the exception with an optional error message, which defaults to "a custom error occurred."
now, let's incorporate our custom exception into a function and demonstrate how to raise and catch it:
in this example, the divide_numbers function attempts to perform division and raises a customerror if the denominator is zero. it also catches any unexpected errors using a generic exception block.
you can create multiple custom exception classes to handle different types of errors in your code. here's an example with two custom exception classes, valuetoosmallerror and valuetoolargeerror:
this example defines two custom exception classes and a function that checks whether a given value is within a specified range.
creating and using custom exception classes in python can significantly enhance your code's readability and maintainability. by defining specific exception classes, you can handle different error scenarios more effectively, leading to more robust and error-tolerant applications.
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