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
56 lines
1.9 KiB
JavaScript
56 lines
1.9 KiB
JavaScript
// Slide 13: LCEL -- the pipe operator and the Runnable protocol
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// Code slide: every component is a Runnable, | composes them.
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const ds = require('./design-system');
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function createSlide(pres, theme) {
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const slide = pres.addSlide();
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ds.helpers.slideBase(slide, pres, theme);
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ds.helpers.addHeader(slide, pres, theme, {
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eyebrow: 'STAGE 1: CHAINS',
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section: 'LCEL',
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title: '| -- декларативная композиция',
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sectionNumber: 1,
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});
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ds.helpers.addCodeBlock(slide, pres, theme, {
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x: 0.5, y: 1.5, w: 9.0, h: 3.25,
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language: 'python',
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filePath: 'examples/lcel_intro.py',
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code: [
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'from langchain_core.prompts import ChatPromptTemplate',
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'from langchain_core.output_parsers import StrOutputParser',
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'from langchain.chat_models import init_chat_model',
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'',
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'prompt = ChatPromptTemplate.from_messages([',
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' ("system", "You are a {style} assistant."),',
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' ("human", "{question}"),',
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'])',
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'model = init_chat_model("openai:gpt-4.1-mini")',
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'',
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'# prompt, model, parser -- все три реализуют Runnable',
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'# Оператор | склеивает их в один chain',
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'chain = prompt | model | StrOutputParser()',
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'',
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'# type(chain) -> RunnableSequence',
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'print(type(chain).__name__)',
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'',
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'# invoke -> dict на вход, str на выход',
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'print(chain.invoke({"style": "concise", "question": "What is LCEL?"}))',
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].join('\n'),
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});
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ds.helpers.addCallout(slide, pres, theme, {
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x: 0.5, y: 4.85, w: 9.0, h: 0.3,
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kind: 'success',
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text: 'Runnable -- единый контракт: invoke / batch / stream / ainvoke / abatch / astream / async stream.',
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});
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ds.helpers.addSourceLine(slide, pres, theme, {
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source: 'python.langchain.com/docs/concepts/lcel/',
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});
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ds.helpers.addPageNumber(slide, pres, theme, 13);
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}
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module.exports = { createSlide }; |