Don’t Use Boolean Flags in Python, Use Policies Instead
ArjanCodes
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In this video, I show how to replace growing conditional logic with the Policy Pattern. Instead of one big function, you split rules into small, composable pieces and combine them into a flexible pipeline. The result is code that’s easier to extend, test, and control even with feature flags or configuration.
???? GitHub Repository: https://git.arjan.codes/2026/policy.
???? ArjanCodes Courses: https://www.arjancodes.com/courses.
???? Join my Discord server: https://discord.arjan.codes.
⌨️ Keyboard I’m using: https://amzn.to/49YM97v.
???? Chapters:
0:00 Intro
2:11 The Problem
2:34 The Policy Pattern
3:05 OOP Version (Quick Overview)
5:50 Strategy vs Policy
6:51 Functional Style (Pythonic Version)
10:56 Policy Registry + Settings
13:37 Why This Is Powerful
14:07 Trade-offs
14:22 Final Thoughts
#arjancodes #softwaredesign #python
In this video, I show how to replace growing conditional logic with the Policy Pattern. Instead of one big function, you split rules into small, composable pieces and combine them into a flexible pipeline. The result is code that’s easier to extend, test, and control even with feature flags or configuration.
???? GitHub Repository: https://git.arjan.codes/2026/policy.
???? ArjanCodes Courses: https://www.arjancodes.com/courses.
???? Join my Discord server: https://discord.arjan.codes.
⌨️ Keyboard I’m using: https://amzn.to/49YM97v.
???? Chapters:
0:00 Intro
2:11 The Problem
2:34 The Policy Pattern
3:05 OOP Version (Quick Overview)
5:50 Strategy vs Policy
6:51 Functional Style (Pythonic Version)
10:56 Policy Registry + Settings
13:37 Why This Is Powerful
14:07 Trade-offs
14:22 Final Thoughts
#arjancodes #softwaredesign #python
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