FastAPI Backend Development Bootcamp · 课时

您的第一个 API 端点

学习创建简单的 GET 端点、定义路由并返回基本的 JSON 响应。

您的第一个 API 端点 是 CoddyKit 上的免费 FastAPI Backend Development Bootcamp 课时。这是第 2 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 FastAPI Backend Development Bootcamp 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 FastAPI Backend Development Bootcamp 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

What's an API Endpoint?

An API endpoint is a specific URL your API exposes — an address that receives requests and returns a service. We start with GET, used to fetch data.

Your FastAPI Application

Every app starts from a FastAPI instance, conventionally named app. This object is the core where all your routes and logic live.

from fastapi import FastAPI

app = FastAPI()

# This 'app' object is where your API lives!

Defining Routes with Decorators

FastAPI uses decorators to bind a URL path to a function. @app.get("/") says: on a GET to the root path, run the function below.

Your First 'Hello World' Endpoint

Here is the classic API Hello World — a single GET endpoint at /. Run it and hit the root in your browser or Postman.

from fastapi import FastAPI

app = FastAPI()

@app.get("/")
def read_root():
    return {"message": "Hello, CoddyKit!"}

# To run: Save as main.py, then 'uvicorn main:app --reload'

Running Your FastAPI App

Run your app with Uvicorn: uvicorn main:app --reload finds app in main.py and auto-restarts whenever you edit code.

FastAPI's JSON Magic

FastAPI's JSON magic: return a Python dict or list and it serializes to a JSON response automatically — no manual conversion needed.

Returning Structured JSON Data

Return a richer Python dict and FastAPI ships it as structured JSON. Here, an endpoint hands back full product details.

from fastapi import FastAPI

app = FastAPI()

@app.get("/product")
def get_product_info():
    return {
        "id": "CK001",
        "name": "CoddyKit Pro Course",
        "price": 49.99,
        "available": True
    }

# Run with: uvicorn main:app --reload
# Access this endpoint at /product

Creating Multiple Endpoints

An API has many endpoints, each for a different resource. Define as many as you need on one app — here, two distinct GET routes.

from fastapi import FastAPI

app = FastAPI()

@app.get("/")
def read_root():
    return {"message": "Welcome to our API!"}

@app.get("/items")
def get_items():
    return [
        {"id": 1, "name": "Laptop"},
        {"id": 2, "name": "Mouse"},
        {"id": 3, "name": "Keyboard"}
    ]

# Run with: uvicorn main:app --reload
# Access at / and /items

Endpoint Naming Conventions

Good endpoint naming keeps an API readable: plural nouns for collections, short lowercase hyphenated paths, and no verbs — the HTTP method implies the action.

Quick Check

Which of the following code snippets correctly defines a FastAPI GET endpoint at the path /status that returns a JSON object {"status": "OK"}?

Lesson Summary

Solid! You built endpoints with decorators, returned dicts as JSON, and ran the app via Uvicorn. Next: making routes dynamic with URL data.

常见问题解答

「您的第一个 API 端点」课时是免费的吗？

是的 — 「您的第一个 API 端点」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 FastAPI Backend Development Bootcamp 课程的其余内容，请升级到 CoddyKit PRO。 FastAPI Backend Development Bootcamp 课程共包含 4 节课。

「您的第一个 API 端点」这节课中我会学到什么？

学习创建简单的 GET 端点、定义路由并返回基本的 JSON 响应。你通过在浏览器中直接运行的动手代码来练习 FastAPI Backend Development Bootcamp，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 FastAPI Backend Development Bootcamp 需要有经验吗？

无需任何先前经验。CoddyKit 上的 FastAPI Backend Development Bootcamp 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 2 节课，共 4 节。

「您的第一个 API 端点」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 FastAPI Backend Development Bootcamp 课中编写并运行代码吗？

能。每节 FastAPI Backend Development Bootcamp 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

此课程中的所有课时

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