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OOP & classes

Classes, instances, methods, dataclasses, and object-oriented design in Python.

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OOP & classes easy

How to Build a Class Method Alternative Constructor from Dict in Python

Use a classmethod alternative constructor to build a Book instance from a dictionary with sensible defaults.

classmethod alternate-constructor oop
Python 
class Book:
    def __init__(self, title, author, pages):
        self.title = title
        self.author = author
        self.pages = pages

    @classmethod
    def from_dict(cls, data):
        """Alternative constructor that builds a Book from a dictionary."""
        return cls(
            title=data["title"],
 …
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