Why Senior Devs Banned This Python Feature 🚫 #pythoninterviewquestions #pythonbeginner #python

本站添加: 2026-06-04

[00:00:00]Look at this code.

[00:00:08]>> If you learned the mutable default argument trap where all instances share the same list, you might think this prints blank, but data class is actually smarter than you. The creators of data classes knew about the shared list bug, so they explicitly banned it. If you try to assign a mutable default like blank, Python crashes with a value error. You must use field default factory list instead.