How to fix TypeError: unhashable type: 'list' when using items like lists as... in Python

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We're excited to share with you our newest video, "How to solve TypeError: unhashable type: 'list' when using items like lists as elements in a set. in Python". 🎥 This series is meticulously designed to arm you with knowledge 🧠 and skills 🛠️ to overcome frequent coding challenges.

Today, we will decipher 🔎 and resolve a common error faced by Python coders: the bit hard to solve TypeError: unhashable type: 'list' when using items like lists as elements in a set.. Here is a snapshot of the code of the video:

Troubling Scenario: ❗️

my_set = { [1, 2, 3] }

Unwanted Result: 🚫
TypeError: unhashable type: 'list' when using items like lists as elements in a set.

Effective Resolution: ✔️

my_set = { tuple([1, 2, 3]) }

Desired Output: 🏁
{(1, 2, 3)}

In this detailed walkthrough, we will illuminate 💡 the underlying cause of this error, and offer a comprehensive explanation: In Python, set elements must be immutable. Lists are mutable, hence unhashable. Code2 corrects this by converting the list to a tuple, which is immutable, thereby making it usable as a set element. 🎯

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