fastapi实例

quick start

安装

pip install fastapi

# ASGI服务器，生成环境可以使用uvicorn
pip install uvicorn

代码

from fastapi import FastAPI
import uvicorn

# 创建一个app实例
app = FastAPI()

# 编写一个路径操作装饰器
@app.get("/")
# 编写一个路径操作函数
async def home():
    # 定义返回值
    return {"user_id": 10001}

运行服务器

uvicorn fastapi_quick_start:app --reload

INFO:     Will watch for changes in these directories: ['C:\\code\\vs_code_py\\fastapi']
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
INFO:     Started reloader process [2128] using WatchFiles
INFO:     Started server process [29052]
INFO:     Waiting for application startup.

也可以直接运行

from fastapi import FastAPI
import uvicorn

app = FastAPI()

@app.get("/")
async def home():
    return {"user_id": 10001}

if __name__ == '__main__':
    uvicorn.run("fastapi_quick_start:app", port = 8080, reload = True)

跳转到http://127.0.0.1:8080/docs，就可以看到自动生成的交互式api文档。