#在VScode中配置virtualenv+fastapi

创建文件FastApiModel ctrl+`打开终端（+shift新终端）

python -m venv env env\Scripts\activate

如果需要安装的依赖比较多 可以执行命令pip install -r requirements.txt

pip install fastapi pip install uvicorn

ctrl+shift+p 找到Python Select Interpreter（命令面板）

选第一个Enter xxx=> Find => 选择env>script>python3

这时就生成了settings.json文件

ctrl+shift+d => create a launch.json file.=>Python=>Flask Launch and debug a Flask web application（运行) 替换成

{
    "name": "Python: FastAPI",
    "type": "python",
    "request": "launch",
    "module": "uvicorn",
    "env": {
        "db_username": "postgres",
        "db_password": "secret",
        "host_server": "localhost",
        "database_name": "fastapi",
        "ssl_mode": "prefer",
        "db_server_port": "5432"
    },
    "args": [
        "main:app",
        "--reload",
        "--port",
        "8000"
    ]
}

之后在FastApiModel文件下创建main.py文件，复制

from typing import Optional
from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Optional[str] = None):
    return {"item_id": item_id, "q": q}

按F5，成功执行，浏览器打开 127.0.0.1查看