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
57 lines
2.1 KiB
JavaScript
57 lines
2.1 KiB
JavaScript
// Slide 19: Tools -- @tool decorator + bind_tools
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// Code slide: define tools and pass them to a model via bind_tools.
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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: 'Tools',
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title: '@tool -- любая функция становится инструментом',
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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/tool_basic.py',
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code: [
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'from langchain.tools import tool',
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'from langchain.chat_models import init_chat_model',
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'',
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'@tool',
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'def get_weather(city: str) -> str:',
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' """Get the current weather for a given city."""',
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' return f"Sunny, 22C in {city}"',
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'',
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'@tool',
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'def search_docs(query: str, top_k: int = 3) -> list[str]:',
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' """Search internal documentation. Returns top_k snippets."""',
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' return [f"doc about {query} #{i}" for i in range(top_k)]',
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'',
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'# bind_tools -- модель знает, какие функции можно вызвать',
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'model = init_chat_model("openai:gpt-4.1-mini")',
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'bound = model.bind_tools([get_weather, search_docs])',
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'',
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'result = bound.invoke("What is the weather in Paris?")',
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'print(result.tool_calls)',
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'# [{"name": "get_weather", "args": {"city": "Paris"}, "id": "..."}]',
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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: 'docstring инструмента = описание, которое видит модель. Названия параметров должны быть говорящими.',
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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/tool_calling/',
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});
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ds.helpers.addPageNumber(slide, pres, theme, 19);
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}
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module.exports = { createSlide }; |