How in Flask on Pyhon 3 using _thread not to delay the http response while processing is in progress?

Question

Multithreading

All the best! I’m studying python a little, but it’s a bit difficult with streams .... until I figured it out to the end :(
I have a simple http server on Flask , a POST request comes to it, python processes it, but for a long time, respectively, the client waits a long time for an answer, and cannot resend a new request until it receives this response, and the response itself is not important ...

Tried something like this:

def append_to_sheet(first, second):
  row = [datetime.now(), first, second]
  sheet.append_row(row)

@app.route("/action" , methods=['POST'])
def cardAction():
  first_param: request.args.get('first'),
  second_param: request.args.get('second')

  while True:
    _thread.start_new_thread(append_to_sheet, (first_param, second_param))
  
  return "ok!"

But it doesn't work :(

Answer 1

Heavy things should be taken out in separate processes by means of queue. For example, Celery, there are other easier and more difficult options.