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
2.1 KiB
JavaScript
54 lines
2.1 KiB
JavaScript
// Slide 17: RunnableParallel + RunnableBranch -- fan-out / conditional routing
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// Code slide: parallel execution and if/else logic in a chain.
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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: 'Runnable helpers',
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title: 'Parallel + Branch -- fan-out и роутинг',
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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/runnable_parallel.py',
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code: [
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'from langchain_core.runnables import RunnableParallel, RunnableBranch',
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'',
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'# Parallel -- один вход, несколько параллельных Runnable-ов, dict на выходе',
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'joke_chain = ChatPromptTemplate.from_template("Tell a joke about {topic}") | model',
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'poem_chain = ChatPromptTemplate.from_template("Write a poem about {topic}") | model',
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'',
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'parallel = RunnableParallel(joke=joke_chain, poem=poem_chain)',
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'result = parallel.invoke({"topic": "cats"})',
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'print(result.keys()) # dict_keys(["joke", "poem"])',
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'',
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'# Branch -- if/else роутинг по условию',
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'branch = RunnableBranch(',
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' (lambda x: "code" in x["topic"].lower(), code_chain),',
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' (lambda x: "math" in x["topic"].lower(), math_chain),',
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' general_chain, # default',
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')',
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'print(branch.invoke({"topic": "code review"}))',
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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: 'RunnableParallel выполняется параллельно -- отлично для multi-aspect анализа (sentiment + summary + keywords).',
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});
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ds.helpers.addSourceLine(slide, pres, theme, {
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source: 'python.langchain.com/docs/how_to/branching/',
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});
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ds.helpers.addPageNumber(slide, pres, theme, 17);
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}
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module.exports = { createSlide }; |