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Duck typing allows objects to be used based on behavior from "summary" of Fluent Python by Luciano Ramalho

Duck typing is a concept in Python that emphasizes the importance of an object's behavior over its type or class. This means that as long as an object behaves like a duck – that is, it quacks like a duck and walks like a duck – then it can be considered a duck. In other words, objects are judged based on what they can do, rather than what they are. This concept is particularly powerful because it allows for greater flexibility and reusability in code. Instead of relying on specific types or classes, duck typing enables developers to focus on the desired behavior of an object. This can lead to more concise and adaptable code that can work with a wider variety of objects. By allowing objects to be used based on their behavior, duck typing promotes the idea of polymorphism in Python. Polymorphism allows different objects to be treated as instances of a common interface, making it easier to write code that can work with multiple types of objects. This can lead to more modular and maintainable code that is easier to extend and modify.
  1. Duck typing is a foundational concept in Python that promotes simplicity, flexibility, and clarity in code. By focusing on an object's behavior rather than its type, developers can write code that is more adaptable, reusable, and maintainable. This concept is a key aspect of Python's dynamic and expressive nature, and is one of the reasons why Python is such a popular and powerful programming language.
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Fluent Python

Luciano Ramalho

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