Custom Python Strings: Inheriting From str vs UserString

The Python str class has many useful features that can help you out when you’re processing text or strings in your code. However, in some situations, all these great features may not be enough for you. You may need to create custom string-like classes. To do this in Python, you can inherit from the built-in str class directly or subclass UserString, which lives in the collections module.

In this tutorial, you’ll learn how to:

• Create custom string-like classes by inheriting from the built-in str class
• Build custom string-like classes by subclassing UserString from the collections module
• Decide when to use str or UserString to create custom string-like classes

Meanwhile, you’ll write a few examples that’ll help you decide whether

 

 

 

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