---
title: "Discussion on \"02_The “Mutable Default Argument” Trap (and Why It Happens)\" | Hashnode"
description: "Discussion on \"02_The “Mutable Default Argument” Trap (and Why It Happens)\". A deep dive into object identity, mutability, and Python’s most common gotcha"
url: "https://hashnode.com/posts/02-python-mutable-vs-immutable-default-argument-trap/695fa88fd2f7956b618b2ec9"
---

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# [02\_The “Mutable Default Argument” Trap (and Why It Happens)](https://somusblog.hashnode.dev/02-python-mutable-vs-immutable-default-argument-trap?utm_source=hashnode&utm_medium=feed)

A deep dive into object identity, mutability, and Python’s most common gotcha

Jan 8 · 4 min read · somusblog.hashnode.dev  
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## Written by

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Developer • Learning in public

Full-stack developer documenting what I’m learning as I go. This space is all about tech, understanding how things work, and writing things down as they start to make sense.

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