server-udp-guessing-game.py

import socket
import struct

def readInt(sock):
    data, addr = sock.recvfrom(4)
    data = struct.unpack("!i", data)[0]
    return data, addr

def sendInt(sock, toSend, whereTo):
    sock.sendto(struct.pack("!i", toSend),
        whereTo)

def sendChar(sock, toSend, whereTo):
    sock.sendto(struct.pack("!c", toSend.encode('ascii')),
        whereTo)

def readChar(sock):
    data, addr = sock.recvfrom(1)
    data = struct.unpack("!c", data)[0].decode('ascii')
    return data, addr

def sendIntArray(sock, toSend, whereTo):
    sendInt(sock, len(toSend), whereTo)
    for value in toSend:
        sendInt(sock, value, whereTo)

def sendCharArray(sock, toSend, whereTo):
    sendInt(sock, len(toSend), whereTo)
    for value in toSend:
        sendChar(sock, value, whereTo)

def readIntArray(sock):
    buff = []
    length, addr = readInt(sock)
    for i in range(length):
        buff.append(readInt(sock)[0])
    return buff, addr

def readCharArray(sock):
    buff = ""
    length, addr = readInt(sock)
    for i in range(length):
        buff+=readChar(sock)[0]
    return buff, addr



if __name__ == "__main__":
    with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
        sock.bind(('localhost', 19999))
        guessed = False
        number = 234
        players = []
        while True:
            data, addr = readInt(sock)
            if addr not in players:
                players.append(addr)
            print(data, addr)
            if data > number:
                sendCharArray(sock, "smaller", addr)
            elif data < number:
                sendCharArray(sock, "bigger", addr)
            elif data == number:
                winner = addr
                break
        print("The winner is", winner)
        for player in players:
            if player != winner:
                sendCharArray(sock, "You lost.", player)
            else:
                sendCharArray(sock, "You won!", player)