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from fastapi import FastAPI, status

from starlette.background import BackgroundTasks

app = FastAPI()

def write_notification(email: str, message=""):

with open("/tmp/log.txt", mode="a") as email_file:

content = f"notification for {email}: {message}"

email_file.write(content)

@app.post("/send-notification/{email}", status_code=status.HTTP_202_ACCEPTED)

async def send_notification(email: str, background_tasks: BackgroundTasks):

background_tasks.add_task(write_notification, email, message="I am fine.")

return {"message": "Notification sent in the background"}

# PYTHONPATH=module_fastapi uvicorn fastapi_background_task:app --reload