from fastapi import FastAPI
import asyncio

app = FastAPI()


async def task1():
    # 模拟执行任务1
    print("开始执行任务1")
    await asyncio.sleep(1)
    print("结束执行任务1")
    return "Result from Task 1"


async def task2():
    # 模拟执行任务2
    print("开始执行任务2")
    await asyncio.sleep(1)
    print("结束执行任务2")
    return "Result from Task 2"


async def task3():
    # 模拟执行任务3
    print("开始执行任务3")
    await asyncio.sleep(1)
    print("结束执行任务3")
    return "Result from Task 3"


async def execute_tasks_async():
    # 并发执行三个任务
    results = await asyncio.gather(task1(), task2(), task3())
    return results


@app.get("/execute_tasks")
async def execute_tasks():
    results = await execute_tasks_async()
    return {"Task 1": results[0], "Task 2": results[1], "Task 3": results[2]}


if __name__ == "__main__":
    import uvicorn

    uvicorn.run(app, host="0.0.0.0", port=5023)

执行结果

解释说明

https://fastapi.tiangolo.com/zh/async/#in-a-hurry