Simon Willison’s Weblog

String types in Python 3. bytes are now immutable (just like the bytestrings they are replacing) and a new mutable buffer type has been introduced.

Posted 9th October 2007 at 2:08 am

Recent articles

Nano Banana Pro aka gemini-3-pro-image-preview is the best available image generation model - 20th November 2025
How I automate my Substack newsletter with content from my blog - 19th November 2025
Trying out Gemini 3 Pro with audio transcription and a new pelican benchmark - 18th November 2025

buffers 2 bytes 1 bytestrings 2 python 1206 python3 21 strings 5 unicode 29

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