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
61 lines
2.0 KiB
JavaScript
61 lines
2.0 KiB
JavaScript
// Slide 09: MessagesPlaceholder + few-shot examples
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// Code slide: how to inject conversation history and demonstration examples.
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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: 'Prompts',
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title: 'MessagesPlaceholder + few-shot',
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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/prompt_fewshot.py',
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code: [
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'from langchain_core.prompts import (',
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' ChatPromptTemplate, MessagesPlaceholder, FewShotChatMessagePromptTemplate,',
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')',
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'',
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'# Few-shot блок: примеры "вопрос -> ответ"',
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'examples = [',
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' {"input": "2+2", "output": "4"},',
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' {"input": "3*3", "output": "9"},',
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']',
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'example_prompt = ChatPromptTemplate.from_messages([',
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' ("human", "{input}"),',
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' ("ai", "{output}"),',
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'])',
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'few_shot = FewShotChatMessagePromptTemplate(',
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' example_prompt=example_prompt, examples=examples,',
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')',
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'',
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'# Сборка: system + few-shot + история + текущий вопрос',
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'prompt = ChatPromptTemplate.from_messages([',
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' ("system", "You are a math assistant."),',
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' few_shot,',
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' MessagesPlaceholder("history"),',
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' ("human", "{question}"),',
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'])',
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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: 'MessagesPlaceholder("history") -- дырка, в которую при invoke подставляется список прошлых сообщений.',
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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/few_shot_examples_chat/',
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});
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ds.helpers.addPageNumber(slide, pres, theme, 9);
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}
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module.exports = { createSlide }; |