Chapter 49

SSE streaming — an LLM's answer word by word

The SSE wire format, authenticated streaming with FastAPI's EventSourceResponse, an error event for mid-way failures, stopping work when the client leaves, chunk and UTF-8 boundaries, and reading the stream with fetch in React with a Stop button.

55 minPython 3.12
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Python for AI Career is a Pro course

The SSE wire format, authenticated streaming with FastAPI's EventSourceResponse, an error event for mid-way failures, stopping work when the client leaves, chunk and UTF-8 boundaries, and reading the stream with fetch in React with a Stop button.

The Python course is free and complete — this course is not made of anything taken out of it. Every chapter of a Pro course runs the full six steps:

  • Encounter — Meet the problem before the definition — what cannot be done without this.
  • Understand — Build the mental model: what Python actually does, and why this way.
  • Worked — A complete example with its real output — run, not imagined.
  • Predict — Say what happens before running it. A wrong prediction teaches more than a right one.
  • Apply — Write it and run it on your own machine. Reading it is not the same as doing it.
  • Stretch — Ten questions from easy to hard. The last ones are difficult on purpose.