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FastAPI Backend Development Bootcamp · 课时

FastAPI 简介与设置

了解 FastAPI 的定义及其优势,并使用 Python 和 Uvicorn 设置开发环境。

FastAPI 简介与设置 是 CoddyKit 上的免费 FastAPI Backend Development Bootcamp 课时。 这是第 1 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。

Welcome to FastAPI!

FastAPI is a modern, high-speed Python web framework for building APIs. It leans on standard type hints, so you ship robust services fast.

Why Choose FastAPI?

FastAPI wins on speed and DX: built on Starlette and Pydantic, it codes fast, catches bugs early via type hints, and auto-generates interactive docs.

Python 3 & Pip: Your Foundation

FastAPI needs Python 3.7+ and pip. Check your version with python3 --version before you go further.

Isolate Your Projects

Always work inside a virtual environment — an isolated package space per project so different versions never collide. Think clean workspace.

Create Your Virtual Env

Create your virtual environment with python3 -m venv .venv, then activate it. You will see (.venv) in your prompt when it is live.

Install FastAPI & Uvicorn

Install the framework and its server: pip install fastapi "uvicorn[standard]". Uvicorn is the ASGI server that actually runs your async app.

Hello FastAPI World!

Drop this into main.py — a tiny FastAPI app with one root route that returns JSON.

from fastapi import FastAPI

# Create a FastAPI instance
app = FastAPI()

# Define a path operation (GET request to the root URL "/")
@app.get("/")
def read_root():
    return {"message": "Hello CoddyKit!"}

Run Your API with Uvicorn

Run it with uvicorn main:app --reload. That points Uvicorn at your app object and auto-restarts on every save. It serves on 127.0.0.1:8000.

Auto-Generated API Docs

FastAPI builds interactive docs for free — Swagger UI at /docs, ReDoc at /redoc. Explore and test your endpoints right in the browser.

Check Your Setup Knowledge

You've learned about setting up FastAPI. Which of the following are TRUE statements about getting started with FastAPI?

Recap: Get Started with FastAPI

Nice work! You set up FastAPI, used a venv, wrote your first endpoint, ran it with Uvicorn, and met the auto-generated docs. Next: building real routes.

常见问题解答

「FastAPI 简介与设置」课时是免费的吗?

是的 — 「FastAPI 简介与设置」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。

「FastAPI 简介与设置」这节课中我会学到什么?

了解 FastAPI 的定义及其优势,并使用 Python 和 Uvicorn 设置开发环境。 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 1 节课,共 4 节。

「FastAPI 简介与设置」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

  1. FastAPI 简介与设置
  2. 您的第一个 API 端点
  3. 路径参数与查询参数
  4. 使用 Swagger UI 构建交互式 API 文档
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