petya
75601988c2
- Cover, TOC, 5 dividers, 3 recap slides - 5 sections (chains, langgraph, deepagents, openswe, ecosystem) - design-system.js with theme tokens + 9 helper functions - research/: timeline + sources + per-tech notes - final-compile.js + merge.js for rebuild pipeline - output/: langchain-evolution.pptx (2.3 MB) + langchain-evolution.pdf (1.1 MB) + 7 sample previews
54 lines
1.9 KiB
JavaScript
54 lines
1.9 KiB
JavaScript
// Slide 07: Streaming -- .stream() yields chunks progressively
|
||
// Code slide: how to consume the model output as a stream.
|
||
|
||
const ds = require('./design-system');
|
||
|
||
function createSlide(pres, theme) {
|
||
const slide = pres.addSlide();
|
||
ds.helpers.slideBase(slide, pres, theme);
|
||
|
||
ds.helpers.addHeader(slide, pres, theme, {
|
||
eyebrow: 'STAGE 1: CHAINS',
|
||
section: 'Streaming',
|
||
title: 'Потоковый вывод -- token за токеном',
|
||
sectionNumber: 1,
|
||
});
|
||
|
||
ds.helpers.addCodeBlock(slide, pres, theme, {
|
||
x: 0.5, y: 1.5, w: 9.0, h: 3.25,
|
||
language: 'python',
|
||
filePath: 'examples/streaming.py',
|
||
code: [
|
||
'from langchain.chat_models import init_chat_model',
|
||
'',
|
||
'model = init_chat_model("openai:gpt-4.1-mini")',
|
||
'',
|
||
'# .stream() -> итератор по AIMessageChunk',
|
||
'for chunk in model.stream("Write a haiku about Python"):',
|
||
' # У каждого chunk-а есть .content (текст) и .response_metadata',
|
||
' print(chunk.content, end="", flush=True)',
|
||
'',
|
||
'print() # перевод строки после потока',
|
||
'',
|
||
'# Async-вариант: model.astream() -- то же самое в async-контексте',
|
||
'import asyncio',
|
||
'',
|
||
'async def main():',
|
||
' async for chunk in model.astream("Write a haiku about async"):',
|
||
' print(chunk.content, end="", flush=True)',
|
||
].join('\n'),
|
||
});
|
||
|
||
ds.helpers.addCallout(slide, pres, theme, {
|
||
x: 0.5, y: 4.85, w: 9.0, h: 0.3,
|
||
kind: 'success',
|
||
text: 'AIMessageChunk можно складывать через оператор + -- для буферизации и метрик.',
|
||
});
|
||
|
||
ds.helpers.addSourceLine(slide, pres, theme, {
|
||
source: 'python.langchain.com/docs/how_to/streaming/',
|
||
});
|
||
ds.helpers.addPageNumber(slide, pres, theme, 7);
|
||
}
|
||
|
||
module.exports = { createSlide }; |