Python's Future object

future.py

from concurrent.futures import Future
import threading
import requests
import logging
import time

# logging configuration
logging.basicConfig(
    level=logging.DEBUG,
    format='%(thread)s %(threadName)s : %(message)s'
)

def callback_future(future): # future param (necessary)
    logging.info('Hi, Im a callback executed until the future have a certain value')
    logging.info(f'The future is {future.result()}')

if __name__ == "__main__":
    future = Future()
    # setting the callback for execution
    future.add_done_callback(callback_future)
    # can be more callbacks to the future, the 'result' param is necessary
    future.add_done_callback(
        lambda future: logging.info('Lambda here')
    )
    logging.info('Starting a complex task')
    time.sleep(2)
    # future data
    future.set_result('david')
    logging.info('Future set with value')