CODEWITHSUNDEEP
pythonasync-awaittwisteddeferred
Scorpius
Scorpius

Reputation: 11

Python 3.6.9 twisted: How to await async function to return x, then continue

I need to run python 3.6.9 with twisted.

I have a function which needs to wait for async event to return certain value in order to continue. This async event always return this value , but it may take time.

Ultimately I would want to do this (pseudo code example):

def API_response(msg):

   if msg == 'hello':
      return x
   if msg == 'world':
      return y

def do_stuff():

   print('I need API to say hello to me')
   do something that triggers API_response
   await until API_response() == x
   print('success!')


start socket managers
run socket managers which will eventually trigger do_stuff()

apparently this can be achieved with await and deferreds, but I cant get it to work. And the underlying problem here is that API_response will always return x and y, but order depends on situation. Hence await until API_response() == x

Upvotes: 1

Views: 498

Answers (1)

Jean-Paul Calderone
Jean-Paul Calderone

Reputation: 48335

You may be interested in a while loop:

def do_stuff():

   print('I need API to say hello to me')
   do something that triggers API_response
   while await until API_response() != x:
       # Delay until you think API_response might be different
   print('success!')

Of course, this code is no more valid than the code in the question. I've assumed there is some valid original code which could be transformed in the same way and only edited this pseudo-pseudo-code to show how a while loop might be helpful.

Upvotes: 1

Related Questions