This Design Pattern Replaces an Entire Class Hierarchy
ArjanCodes
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What should you do when objects differ by type: create subclasses, store an enum like plan_type, or represent each variation as an object? In this video, I use a realistic Python subscription system to compare all three approaches and introduce the Type Object pattern.
???? GitHub Repository: https://git.arjan.codes/2026/type.
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⌨️ Keyboard I’m using: https://amzn.to/49YM97v.
???? Chapters:
0:00 Intro
2:22 Approach 1: Model the Variation With Subclasses
3:47 Approach 2: Just Store the Type
5:47 Approach 3: Make the Type an Object
8:51 Why Not Just Use the Enum?
9:45 Where Do the Type Objects Live?
14:09 Choosing Between the Three
15:05 Final Thoughts
#arjancodes #softwaredesign #python
What should you do when objects differ by type: create subclasses, store an enum like plan_type, or represent each variation as an object? In this video, I use a realistic Python subscription system to compare all three approaches and introduce the Type Object pattern.
???? GitHub Repository: https://git.arjan.codes/2026/type.
???? Join my Discord server: https://discord.arjan.codes.
⌨️ Keyboard I’m using: https://amzn.to/49YM97v.
???? Chapters:
0:00 Intro
2:22 Approach 1: Model the Variation With Subclasses
3:47 Approach 2: Just Store the Type
5:47 Approach 3: Make the Type an Object
8:51 Why Not Just Use the Enum?
9:45 Where Do the Type Objects Live?
14:09 Choosing Between the Three
15:05 Final Thoughts
#arjancodes #softwaredesign #python
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