首先安装打开终端pip install fastapi pip install fastapi[standard]写测试代码from fastapi import FastAPI app FastAPI() app.get(/) def root(): return {Hello: World} app.get(/items) def read_items(): return [ {item_id: 1, q: chuan}, {item_id: 2, q: chuan3}, {item_id: 3, q: chuan2}, ]3. 在相关目录下启动代码fastapi dev 文件名.py启动成功后打开浏览器访问localhost:8000/items第二种办法启动服务uvicorn 文件名:app --reload第三种启动服务优化代码from fastapi import FastAPI app FastAPI() app.get(/) def root(): return {Hello: World} app.get(/items) def read_items(): return [ {item_id: 1, q: chuan}, {item_id: 2, q: chuan3}, {item_id: 3, q: chuan2}, ] if __name__ __main__: import uvicorn uvicorn.run(app, host127.0.0.1, port8000)直接启动即可