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Python: Master the Art of Design Patterns by Sakis Kasampalis, Chetan Giridhar, Dusty Phillips

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Chapter 3. When Objects Are Alike

In the programming world, duplicate code is considered evil. We should not have multiple copies of the same, or similar, code in different places.

There are many ways to merge pieces of code or objects that have a similar functionality. In this chapter, we'll be covering the most famous object-oriented principle: inheritance. As discussed in Chapter 1, Object-oriented Design, inheritance allows us to create is a relationships between two or more classes, abstracting common logic into superclasses and managing specific details in the subclass. In particular, we'll be covering the Python syntax and principles for:

  • Basic inheritance
  • Inheriting from built-ins
  • Multiple inheritance
  • Polymorphism and duck typing

Basic inheritance ...

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