How to fix TypeError: unhashable type: 'list' when adding a list to a set. in Python

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We're excited to share with you our newest video, "How to solve TypeError: unhashable type: 'list' when adding a list to 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 adding a list to a set.. Here is a snapshot of the code of the video:

Troubling Scenario: ❗️

s = set()
s.add([1, 2, 3])


Unwanted Result: 🚫
TypeError: unhashable type: 'list' when adding a list to a set.

Effective Resolution: ✔️

s = set()
s.add(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 Code1, lists cannot be added to a set because they are mutable. In Code2, converting the list to a tuple, which is immutable, corrects the error, allowing it to be added to the set. 🎯

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