November 2018
Beginner
304 pages
7h 35m
English
Content preview from Learn Programming in Python with Cody Jackson
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User-defined exceptions
Python allows for a programmer to create new exceptions if the project warrants them. However, make sure that one of the built-in exceptions won't do the job for you. They have been tested and tweaked over the years and not only do they work effectively, but they have been optimized for performance and are bug-free.
Making your own exceptions involves object-oriented programming, which will be covered in Chapter 4, Functions and Object Oriented Programming, in the Classes, methods, and namespaces section. To make a custom exception, the programmer determines which base exception to use as the class to inherit from. For example, making an exception for negative numbers or one for imaginary numbers would probably fall ...
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