Web Reference: Oct 13, 2025 · Strings in Python are "immutable" i.e. they cannot be changed after they are created. Strings are immutable by design to keep them safe, consistent, and efficient. The truly important point to take away from all this is that strings don't have an append function because they're immutable. Strings in Python are immutable, meaning you can’t change their content after creation. To check if an object is mutable, you can try altering its contents. If you succeed without an error, it’s mutable.
YouTube Excerpt: It might seem like you can change
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