Non blocking sockets

#Blocking vs Non Blocking Sockets
#Blocking stops
#Non Blocking runs in the background
 
"""
https://docs.python.org/3.8/howto/sockets.html#non-blocking-sockets
ready_to_read, ready_to_write, in_error = \
               select.select(
                  potential_readers,
                  potential_writers,
                  potential_errs,
                  timeout)
"""
#Imports
import logging
import socket
import select
 
logging.basicConfig(format='%(levelname)s - %(asctime)s: %(message)s',datefmt='%H:%M:%S', level=logging.DEBUG)
 
#Blocking socket example
def create_blocking(host,ip):
    logging.info('Blocking - creating socket')
    s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
 
    logging.info('Blocking - connecting')
    s.connect((host,ip))
 
    logging.info('Blocking - connected')
    logging.info('Blocking - sending...')
    s.send(b'hello\r\n')
 
    logging.info('Blocking - waiting...')
    data = s.recv(1024)
    logging.info(f'Blocking - data= {len(data)}')
    logging.info('Blocking - closing...')
    s.close()
 
#Non Blocking socket example
def create_nonblocking(host,port):
    logging.info('Non Blocking - creating socket')
    s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
 
    logging.info('Non Blocking - connecting')
    ret = s.connect_ex((host,port)) #BLOCKING
 
    if ret != 0:
        logging.info('Non Blocking - failed to connect!')
        return
 
    logging.info('Non Blocking - connected!')
    s.setblocking(False)
 
    inputs = [s]
    outputs = [s]
    while inputs:
        logging.info('Non Blocking - waiting...')
        readable,writable,exceptional = select.select(inputs,outputs,inputs,0.5)
 
        for s in writable:
            logging.info('Non Blocking - sending...')
            data = s.send(b'hello\r\n')
            logging.info(f'Non Blocking - sent: {data}')
            outputs.remove(s)
 
        for s in readable:
            logging.info(f'Non Blocking - reading...')
            data = s.recv(1024)
            logging.info(f'Non Blocking - data: {len(data)}')
            logging.info(f'Non Blocking - closing...')
            s.close()
            inputs.remove(s)
            break
 
        for s in exceptional:
            logging.info(f'Non Blocking - error')
            inputs.remove(s)
            outputs.remove(s)
            break
 
 
 
 
#Main 
def main():
    #create_blocking('voidrealms.com',80)
    create_nonblocking('voidrealms.com',80)
 
if __name__ == "__main__":
    main()