add custom example selector

prompt_custom_example_selector.ipynb

@@ -0,0 +1,124 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.prompts.example_selector.base import BaseExampleSelector\n",
+    "from typing import Dict, List\n",
+    "import numpy as np\n",
+    "\n",
+    "class CustomExampleSelector(BaseExampleSelector):\n",
+    "\n",
+    "    def __init__(self, examples: List[Dict[str, str]]) -> None:\n",
+    "        self.examples = examples\n",
+    "\n",
+    "    def add_example(self, example: Dict[str, str]):\n",
+    "        self.examples.append(example)\n",
+    "\n",
+    "    def select_examples(self) -> List[dict]:\n",
+    "        return np.random.choice(self.examples, size=2, replace=False)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "array([{'name', '黄奕'}, {'王刚', 'name'}], dtype=object)"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "examples = [\n",
+    "    {\"name\", \"李振\"},\n",
+    "    {\"name\", \"张三\"},\n",
+    "    {\"name\", \"王刚\"},\n",
+    "    {\"name\", \"黄奕\"},\n",
+    "    {\"name\", \"赵军\"},\n",
+    "]\n",
+    "\n",
+    "example_selector = CustomExampleSelector(examples)\n",
+    "\n",
+    "example_selector.select_examples()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[{'name', '李振'},\n",
+       " {'name', '张三'},\n",
+       " {'name', '王刚'},\n",
+       " {'name', '黄奕'},\n",
+       " {'name', '赵军'},\n",
+       " {'name', '秦都'}]"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "example_selector.add_example({\"name\", \"秦都\"})\n",
+    "example_selector.examples"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "array([{'秦都', 'name'}, {'张三', 'name'}], dtype=object)"
+      ]
+     },
+     "execution_count": 9,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "example_selector.select_examples()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.3"
+  },
+  "orig_nbformat": 4
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}