本快速入门将向您介绍如何安装我们的库并发出您的第一个 Gemini API 请求。
准备工作
您需要一个 Gemini API 密钥。如果您还没有 API 密钥,可以在 Google AI Studio 中免费获取。
安装 Google GenAI SDK
Python
使用 Python 3.9 及更高版本时,请使用以下 pip 命令安装 google-genai
软件包:
pip install -q -U google-genai
JavaScript
使用 Node.js v18+,使用以下 npm 命令安装 适用于 TypeScript 和 JavaScript 的 Google Gen AI SDK:
npm install @google/genai
Go
使用 go get 命令在模块目录中安装 google.golang.org/genai:
go get google.golang.org/genai
Java
如果您使用的是 Maven,则可以通过将以下代码添加到依赖项中来安装 google-genai:
<dependencies> <dependency> <groupId>com.google.genai</groupId> <artifactId>google-genai</artifactId> <version>1.0.0</version> </dependency> </dependencies>
Apps 脚本
- 如需创建新的 Apps 脚本项目,请前往 script.new。
- 点击 Untitled project。
- 将 Apps 脚本项目重命名为 AI Studio,然后点击重命名。
- 设置 API 密钥
- 点击左侧的项目设置
。
- 在脚本属性下,点击添加脚本属性。
- 对于媒体资源,输入键名称:
GEMINI_API_KEY
。 - 在 Value(值)中,输入 API 密钥的值。
- 点击保存脚本属性。
- 点击左侧的项目设置
- 将
Code.gs
文件内容替换为以下代码:
提交第一个请求
下面的示例使用 generateContent
方法使用 Gemini 2.5 Flash 模型向 Gemini API 发送请求。
Python
from google import genai client = genai.Client(api_key="YOUR_API_KEY") response = client.models.generate_content( model="gemini-2.5-flash", contents="Explain how AI works in a few words" ) print(response.text)
JavaScript
import { GoogleGenAI } from "@google/genai"; const ai = new GoogleGenAI({ apiKey: "YOUR_API_KEY" }); async function main() { const response = await ai.models.generateContent({ model: "gemini-2.5-flash", contents: "Explain how AI works in a few words", }); console.log(response.text); } main();
Go
package main import ( "context" "fmt" "log" "google.golang.org/genai" ) func main() { ctx := context.Background() client, err := genai.NewClient(ctx, &genai.ClientConfig{ APIKey: "YOUR_API_KEY", Backend: genai.BackendGeminiAPI, }) if err != nil { log.Fatal(err) } result, err := client.Models.GenerateContent( ctx, "gemini-2.5-flash", genai.Text("Explain how AI works in a few words"), nil, ) if err != nil { log.Fatal(err) } fmt.Println(result.Text()) }
Java
package com.example; import com.google.genai.Client; import com.google.genai.types.GenerateContentResponse; public class GenerateTextFromTextInput { public static void main(String[] args) { // The client gets the API key from the environment variable `GOOGLE_API_KEY`. Client client = new Client(); GenerateContentResponse response = client.models.generateContent( "gemini-2.5-flash", "Explain how AI works in a few words", null); System.out.println(response.text()); } }
Apps 脚本
// See https://developers.google.com/apps-script/guides/properties // for instructions on how to set the API key. const apiKey = PropertiesService.getScriptProperties().getProperty('GEMINI_API_KEY'); function main() { const payload = { contents: [ { parts: [ { text: 'Explain how AI works in a few words' }, ], }, ], }; const url = `https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key=${apiKey}`; const options = { method: 'POST', contentType: 'application/json', payload: JSON.stringify(payload) }; const response = UrlFetchApp.fetch(url, options); const data = JSON.parse(response); const content = data['candidates'][0]['content']['parts'][0]['text']; console.log(content); }
REST
curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key=$YOUR_API_KEY" \ -H 'Content-Type: application/json' \ -X POST \ -d '{ "contents": [ { "parts": [ { "text": "Explain how AI works in a few words" } ] } ] }'
我们的许多代码示例默认处于“思考”状态
本网站上的许多代码示例都使用 Gemini 2.5 Flash 模型,该模型默认启用了“思考”功能,以提高回答质量。请注意,这可能会增加响应时间和令牌用量。如果您优先考虑速度或希望尽可能降低费用,可以将思考预算设为零来停用此功能,如以下示例所示。如需了解详情,请参阅思考指南。
Python
from google import genai from google.genai import types client = genai.Client(api_key="GEMINI_API_KEY") response = client.models.generate_content( model="gemini-2.5-flash", contents="Explain how AI works in a few words", config=types.GenerateContentConfig( thinking_config=types.ThinkingConfig(thinking_budget=0) # Disables thinking ), ) print(response.text)
JavaScript
import { GoogleGenAI } from "@google/genai"; const ai = new GoogleGenAI({ apiKey: "GEMINI_API_KEY" }); async function main() { const response = await ai.models.generateContent({ model: "gemini-2.5-flash", contents: "Explain how AI works in a few words", config: { thinkingConfig: { thinkingBudget: 0, // Disables thinking }, } }); console.log(response.text); } await main();
Go
package main import ( "context" "fmt" "os" "google.golang.org/genai" ) func main() { ctx := context.Background() client, _ := genai.NewClient(ctx, &genai.ClientConfig{ APIKey: os.Getenv("GEMINI_API_KEY"), Backend: genai.BackendGeminiAPI, }) result, _ := client.Models.GenerateContent( ctx, "gemini-2.5-flash", genai.Text("Explain how AI works in a few words"), &genai.GenerateContentConfig{ ThinkingConfig: &genai.ThinkingConfig{ ThinkingBudget: int32(0), // Disables thinking }, } ) fmt.Println(result.Text()) }
REST
curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key=$GEMINI_API_KEY" \ -H 'Content-Type: application/json' \ -X POST \ -d '{ "contents": [ { "parts": [ { "text": "Explain how AI works in a few words" } ] } ] "generationConfig": { "thinkingConfig": { "thinkingBudget": 0 } } }'
Apps 脚本
// See https://developers.google.com/apps-script/guides/properties // for instructions on how to set the API key. const apiKey = PropertiesService.getScriptProperties().getProperty('GEMINI_API_KEY'); function main() { const payload = { contents: [ { parts: [ { text: 'Explain how AI works in a few words' }, ], }, ], }; const url = `https://generativelanguage.googleapis.com/v1beta/models/gemini-2.5-flash:generateContent?key=${apiKey}`; const options = { method: 'POST', contentType: 'application/json', payload: JSON.stringify(payload) }; const response = UrlFetchApp.fetch(url, options); const data = JSON.parse(response); const content = data['candidates'][0]['content']['parts'][0]['text']; console.log(content); }
后续步骤
现在,您已发出第一个 API 请求,不妨探索以下指南,了解 Gemini 的运作方式: