初始化项目：langgraph 学习笔记与 lg_common 通用组件包

2026-08-16 00:25:21 +08:00
commit b3f3b72f07
29 changed files with 25395 additions and 0 deletions
@@ -0,0 +1,138 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "id": "initial_id",
+   "metadata": {
+    "collapsed": true,
+    "ExecuteTime": {
+     "end_time": "2026-07-29T11:54:37.402220Z",
+     "start_time": "2026-07-29T11:54:37.062467Z"
+    }
+   },
+   "source": [
+    "from typing import TypedDict, Annotated\n",
+    "from operator import add\n",
+    "\n",
+    "from langgraph.graph import StateGraph, START, END\n",
+    "\n",
+    "\n",
+    "# 1. 定义状态\n",
+    "class OverAllState(TypedDict):\n",
+    "    logs: Annotated[list[str], add]\n",
+    "    id: str\n",
+    "\n",
+    "\n",
+    "# 2. 定义节点\n",
+    "def node_1(state: OverAllState) -> OverAllState:\n",
+    "    id = state[\"id\"]\n",
+    "    return {\n",
+    "        \"logs\": [\"node_1 运行完了\"],\n",
+    "        \"id\": id + \",node_1\"\n",
+    "    }\n",
+    "\n",
+    "\n",
+    "def node_2(state: OverAllState) -> OverAllState:\n",
+    "    id = state[\"id\"]\n",
+    "    return {\n",
+    "        \"logs\": [\"node_2 运行完了\"],\n",
+    "        \"id\": id + \",node_2\"\n",
+    "    }\n",
+    "\n",
+    "\n",
+    "# 图\n",
+    "builder = StateGraph(state_schema=OverAllState)\n",
+    "builder.add_node(node_1)\n",
+    "builder.add_node(node_2)\n",
+    "\n",
+    "builder.add_edge(START, \"node_1\")\n",
+    "builder.add_edge(\"node_1\", \"node_2\")\n",
+    "builder.add_edge(\"node_2\", END)\n",
+    "\n",
+    "graph = builder.compile()\n",
+    "\n",
+    "result = graph.invoke({\"id\": \"gqt_\"})\n",
+    "print(result)"
+   ],
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'logs': ['node_1 运行完了', 'node_2 运行完了'], 'id': 'gqt_,node_1,node_2'}\n"
+     ]
+    }
+   ],
+   "execution_count": 2
+  },
+  {
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2026-07-29T11:54:38.247128Z",
+     "start_time": "2026-07-29T11:54:37.414230Z"
+    }
+   },
+   "cell_type": "code",
+   "source": [
+    "graph_mermaid=graph.get_graph().draw_mermaid()\n",
+    "print(graph_mermaid)"
+   ],
+   "id": "615a7ac2bdbdfd2f",
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "---\n",
+      "config:\n",
+      "  flowchart:\n",
+      "    curve: linear\n",
+      "---\n",
+      "graph TD;\n",
+      "\t__start__([<p>__start__</p>]):::first\n",
+      "\tnode_1(node_1)\n",
+      "\tnode_2(node_2)\n",
+      "\t__end__([<p>__end__</p>]):::last\n",
+      "\t__start__ --> node_1;\n",
+      "\tnode_1 --> node_2;\n",
+      "\tnode_2 --> __end__;\n",
+      "\tclassDef default fill:#f2f0ff,line-height:1.2\n",
+      "\tclassDef first fill-opacity:0\n",
+      "\tclassDef last fill:#bfb6fc\n",
+      "\n"
+     ]
+    }
+   ],
+   "execution_count": 3
+  },
+  {
+   "metadata": {},
+   "cell_type": "code",
+   "outputs": [],
+   "execution_count": null,
+   "source": "",
+   "id": "fb967b9e12fee1c0"
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}