How do you use Python and JavaScript SDKs with the Gemini API?

# Python SDK setup:
pip install google-genai

import os
from google import genai

# Authentication - reads GEMINI_API_KEY from environment
os.environ["GEMINI_API_KEY"] = "your-key-here"  # or set externally
client = genai.Client()

# Basic text generation:
interaction = client.interactions.create(
    model="gemini-3.5-flash",
    input="Write a Python web scraper.",
)
print(interaction.output_text)

# Async version:
import asyncio
async def async_example():
    interaction = await client.aio.interactions.create(
        model="gemini-3.5-flash",
        input="Async web scraping example",
    )
    return interaction.output_text

asyncio.run(async_example())

// JavaScript/TypeScript SDK:
npm install @google/genai

import { GoogleGenAI } from "@google/genai";

const ai = new GoogleGenAI({});  // reads GEMINI_API_KEY from env

// Basic interaction:
const interaction = await ai.interactions.create({
    model: "gemini-3.5-flash",
    input: "Explain async/await in JavaScript.",
});
console.log(interaction.outputText);

// Streaming:
const stream = await ai.interactions.create({
    model: "gemini-3.5-flash",
    input: "Write a long blog post about AI.",
    stream: true,
});
for await (const chunk of stream) {
    process.stdout.write(chunk.outputText ?? "");
}