Objects and classes

Designing your own types, reusing them through inheritance, and making them work with Python's built-in operations.

About 6 hours of study

Learning objectives

• Design classes with attributes and methods
• Reuse code with inheritance and super
• Add special methods to your classes

Lessons

1. 1

   Classes and objects Intermediate

   Design your own types with attributes and methods, and watch objects live in memory.

2. 2

   Inheritance Intermediate

   Build new classes on top of old ones, override methods, and call the parent with super().

3. 3

   Special methods Intermediate

   Make your objects print nicely, compare with ==, add with +, and work with len().

Module practice

• A Temperature classEasy
• Bank accountMedium
• Rectangle classMedium
• A small libraryHard
• Animal soundsEasy
• Shapes with one interfaceMedium
• PayrollHard
• A printable pointEasy
• Adding fractionsMedium
• Vectors that behave like numbersHard

‹ Reliable codeRecursion and data structures ›