#!/usr/bin/python3
# -*- coding: utf-8 -*-

import socket

server_port = 12000

# Create a socket object (defaults to AF_INET and SOCK_STREAM)
# IF_INET says IPv4, and SOCK_STREAM says TCP
server_socket = socket.socket(family=socket.AF_INET, type=socket.SOCK_STREAM)

# server does not need to know its own IP
server_socket.bind(("", server_port))

# Argument specifies the number of unaccepted connections
# that the system will allow before refusing new connections.
server_socket.listen(2)

print("The server is ready to receive")

while True:
    connection_socket, addr = server_socket.accept()
    print("client connection_socket address:", addr)
    sentence = connection_socket.recv(1024)
    capitalized_sentence = sentence.decode().upper()
    connection_socket.send(capitalized_sentence.encode())
    connection_socket.close()