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Title: Inheritance and Internals: OOP in Python (Summary) (Video) – Real Python

Open Graph Title: Inheritance and Internals: OOP in Python (Summary) – Real Python

Description: In the previous lesson, I showed you abstract base classes and a duck typing approach to the sequence protocol. This lesson summarizes part two of the course. You can build hierarchies of classes to better represent your real-world structures and to…

Open Graph Description: In the previous lesson, I showed you abstract base classes and a duck typing approach to the sequence protocol. This lesson summarizes part two of the course. You can build hierarchies of classes to better represent your real-world structures and to…

Opengraph URL: https://realpython.com/lessons/python-class-inheritance-summary/

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Intro to Object-Oriented Programming (OOP) in Pythonhttps://realpython.com/courses/intro-object-oriented-programming-oop-python/
Inheritance and Composition: A Python OOP Guidehttps://realpython.com/courses/inheritance-composition-python/
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00:00https://realpython.com/lessons/python-class-inheritance-summary/#t=0.65
In the previous lesson, I showed you abstract base classes and a duck typinghttps://realpython.com/lessons/python-class-inheritance-summary/#t=0.65
approach to the sequence protocol.https://realpython.com/lessons/python-class-inheritance-summary/#t=5.35
This lesson summarizes part two of the course.https://realpython.com/lessons/python-class-inheritance-summary/#t=7.7
00:11https://realpython.com/lessons/python-class-inheritance-summary/#t=11.91
You can build hierarchies of classes to better represent your real-worldhttps://realpython.com/lessons/python-class-inheritance-summary/#t=11.91
structures and to reuse your code. This is known as inheritance.https://realpython.com/lessons/python-class-inheritance-summary/#t=15.69
A child class that extends a parent inherits its aspects.https://realpython.com/lessons/python-class-inheritance-summary/#t=21.25
00:25https://realpython.com/lessons/python-class-inheritance-summary/#t=25.81
A child isn’t stuck with those aspects. They can override them.https://realpython.com/lessons/python-class-inheritance-summary/#t=25.81
If a child does override the parent,https://realpython.com/lessons/python-class-inheritance-summary/#t=30.56
it can use super() to get at the parent’s methods,https://realpython.com/lessons/python-class-inheritance-summary/#t=32.88
meaning they don’t have to rewrite them.https://realpython.com/lessons/python-class-inheritance-summary/#t=35.29
00:38https://realpython.com/lessons/python-class-inheritance-summary/#t=38.39
Class hierarchies can have as many levels as you like,https://realpython.com/lessons/python-class-inheritance-summary/#t=38.39
and in fact, a class can also inherit from multiple parents.https://realpython.com/lessons/python-class-inheritance-summary/#t=42.16
If you want to partially define a class to spec out an interface,https://realpython.com/lessons/python-class-inheritance-summary/#t=46.92
the ABC module provides tools for doing that.https://realpython.com/lessons/python-class-inheritance-summary/#t=50.44
00:55https://realpython.com/lessons/python-class-inheritance-summary/#t=55.66
Everything in Python is an object (ka-ching!)https://realpython.com/lessons/python-class-inheritance-summary/#t=55.66
and when you do things to that object, like adding,https://realpython.com/lessons/python-class-inheritance-summary/#t=59.75
it’s done by invoking a dunder method. For example,https://realpython.com/lessons/python-class-inheritance-summary/#t=62.68
the descriptor protocol uses dunder methods to make methods behave likehttps://realpython.com/lessons/python-class-inheritance-summary/#t=67.11
attributes,https://realpython.com/lessons/python-class-inheritance-summary/#t=71.13
and the sequence protocol uses dunder methods to make things list-like. Thehttps://realpython.com/lessons/python-class-inheritance-summary/#t=72.07
standard library takes full advantage of the class mechanisms in the language,https://realpython.com/lessons/python-class-inheritance-summary/#t=77.01
implementing the data class shortcut to make it faster to write attributeshttps://realpython.com/lessons/python-class-inheritance-summary/#t=81.29
and the Enum class to represent groups of constants.https://realpython.com/lessons/python-class-inheritance-summary/#t=86.11
01:30https://realpython.com/lessons/python-class-inheritance-summary/#t=90.94
This is part two of a three-part course.https://realpython.com/lessons/python-class-inheritance-summary/#t=90.94
Parts one and two were about the how—the syntax of classes in Python—https://realpython.com/lessons/python-class-inheritance-summary/#t=93.56
but just because you can doesn’t necessarily mean you should.https://realpython.com/lessons/python-class-inheritance-summary/#t=99.33
01:43https://realpython.com/lessons/python-class-inheritance-summary/#t=103.7
Part three of the course is a bit more philosophical.https://realpython.com/lessons/python-class-inheritance-summary/#t=103.7
It talks about how to write better object-oriented code and maybe when youhttps://realpython.com/lessons/python-class-inheritance-summary/#t=107.25
shouldn’t. Don’t worry, it isn’t highfalutin philosophy.https://realpython.com/lessons/python-class-inheritance-summary/#t=111.11
01:54https://realpython.com/lessons/python-class-inheritance-summary/#t=114.72
There are code examples to show you each of the principles covered.https://realpython.com/lessons/python-class-inheritance-summary/#t=114.72
A good part of the course is based on SOLID.https://realpython.com/lessons/python-class-inheritance-summary/#t=119.11
That’s an acronym to keep in mind that helps you write better object-orientedhttps://realpython.com/lessons/python-class-inheritance-summary/#t=121.73
code. What’s it stand for? Take part three to find out.https://realpython.com/lessons/python-class-inheritance-summary/#t=125.34
02:09https://realpython.com/lessons/python-class-inheritance-summary/#t=129.73
Or just Google SOLID and object-oriented and spoil the whole thing for yourself.https://realpython.com/lessons/python-class-inheritance-summary/#t=129.73
02:16https://realpython.com/lessons/python-class-inheritance-summary/#t=136.08
Well, thanks for sticking with me so far. On to part three.https://realpython.com/lessons/python-class-inheritance-summary/#t=136.08
Sept. 13, 2023https://realpython.com/lessons/python-class-inheritance-summary/#comment-a5432d11-daa1-446e-9c19-7e1eb98c237c
Sept. 14, 2023https://realpython.com/lessons/python-class-inheritance-summary/#comment-5885bf20-1d85-4117-b483-2c10df91c020
Oct. 2, 2023https://realpython.com/lessons/python-class-inheritance-summary/#comment-6c0f14b9-914e-489d-a34d-b90d1d9ffe18
Feb. 23, 2024https://realpython.com/lessons/python-class-inheritance-summary/#comment-c8612656-c314-4dcc-840d-976f4f0f2f9c
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https://realpython.com/lessons/python-class-abstracts-and-interfaces/
Overviewhttps://realpython.com/courses/python-class-inheritance/
Inheritance and Internals: OOP in Python (Overview) 03:38 https://realpython.com/videos/python-class-inheritance-overview/
Inheritance Inside Python 09:07 https://realpython.com/videos/inheritance-in-python/
Multiple Inheritance - Multiple Parents 09:30 https://realpython.com/lessons/python-multiple-inheritance/
Class Internals 08:58 https://realpython.com/lessons/python-class-internals/
More Special Methods 06:50 https://realpython.com/lessons/python-class-special-methods/
Classes in the Standard Library 07:23 https://realpython.com/lessons/python-class-standard-library/
Abstracts and Interfaces 08:41 https://realpython.com/lessons/python-class-abstracts-and-interfaces/
Inheritance and Internals: OOP in Python (Summary) 02:21 https://realpython.com/lessons/python-class-inheritance-summary/
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