Web Reference: Jul 23, 2025 · In Python, we can use mutable lists which are lists that we can change after creating them. We can add, remove, or modify items in the list without creating a new one. Python lists are mutable, allowing you to change, add, or remove elements. Strings in Python are immutable, meaning you can’t change their content after creation. Jun 13, 2014 · 1 Yes, they are mutable. In your second example you are overwriting the value of l1 with a new list, rather than modifying the object it refers to. To modify the original list, you could use the += operator:
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