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Exercise

Building a formal interface with ABC

Formal interfaces offer a more enforceable contract between an interface and any classes that implement it. You'll practice creating a formal interface made up of two abstract methods, using the abc module. The ABC class and abstractmethod decorator have been imported from abc. Have fun!

Instructions

100 XP
  • Create a formal interface, called Product.
  • Define purchase() as an abstract method with parameters self and quantity, and add the pass keyword to the method body.
  • Define the update_price() abstract method, which takes parameters self and new_price.