OpenAI Agent
OpenAI API that supports function calling, it’s never been easier to build your own agent!
In this notebook tutorial, we showcase how to write your own OpenAI agent
Setup
First, you need to install the llamaindex
package. You can do this by running the following command in your terminal:
pnpm i llamaindex
Then we can define a function to sum two numbers and another function to divide two numbers.
function sumNumbers({ a, b }: { a: number; b: number }): number {
return a + b;
}
// Define a function to divide two numbers
function divideNumbers({ a, b }: { a: number; b: number }): number {
return a / b;
}
Create a function tool
Now we can create a function tool from the sum function and another function tool from the divide function.
For the parameters of the sum function, we can define a JSON schema.
JSON Schema
const sumJSON = {
type: "object",
properties: {
a: {
type: "number",
description: "The first number",
},
b: {
type: "number",
description: "The second number",
},
},
required: ["a", "b"],
};
const divideJSON = {
type: "object",
properties: {
a: {
type: "number",
description: "The dividend a to divide",
},
b: {
type: "number",
description: "The divisor b to divide by",
},
},
required: ["a", "b"],
};
const sumFunctionTool = new FunctionTool(sumNumbers, {
name: "sumNumbers",
description: "Use this function to sum two numbers",
parameters: sumJSON,
});
const divideFunctionTool = new FunctionTool(divideNumbers, {
name: "divideNumbers",
description: "Use this function to divide two numbers",
parameters: divideJSON,
});
Create an OpenAIAgent
Now we can create an OpenAIAgent with the function tools.
const agent = new OpenAIAgent({
tools: [sumFunctionTool, divideFunctionTool],
verbose: true,
});
Chat with the agent
Now we can chat with the agent.
const response = await agent.chat({
message: "How much is 5 + 5? then divide by 2",
});
console.log(String(response));
Full code
import { FunctionTool, OpenAIAgent } from "llamaindex";
// Define a function to sum two numbers
function sumNumbers({ a, b }: { a: number; b: number }): number {
return a + b;
}
// Define a function to divide two numbers
function divideNumbers({ a, b }: { a: number; b: number }): number {
return a / b;
}
// Define the parameters of the sum function as a JSON schema
const sumJSON = {
type: "object",
properties: {
a: {
type: "number",
description: "The first number",
},
b: {
type: "number",
description: "The second number",
},
},
required: ["a", "b"],
};
// Define the parameters of the divide function as a JSON schema
const divideJSON = {
type: "object",
properties: {
a: {
type: "number",
description: "The argument a to divide",
},
b: {
type: "number",
description: "The argument b to divide",
},
},
required: ["a", "b"],
};
async function main() {
// Create a function tool from the sum function
const sumFunctionTool = new FunctionTool(sumNumbers, {
name: "sumNumbers",
description: "Use this function to sum two numbers",
parameters: sumJSON,
});
// Create a function tool from the divide function
const divideFunctionTool = new FunctionTool(divideNumbers, {
name: "divideNumbers",
description: "Use this function to divide two numbers",
parameters: divideJSON,
});
// Create an OpenAIAgent with the function tools
const agent = new OpenAIAgent({
tools: [sumFunctionTool, divideFunctionTool],
verbose: true,
});
// Chat with the agent
const response = await agent.chat({
message: "How much is 5 + 5? then divide by 2",
});
// Print the response
console.log(String(response));
}
main().then(() => {
console.log("Done");
});