import socket
import threading

class Chat(object):

    UDP_IP="172.19.7.255" #ip of our hostel
    UDP_PORT_SEND=1100 # port number - u can use any num from 1000 to hz, I used till 10000
    UDP_PORT = 1100

    def __init__(self):
        self.sock = socket.socket( socket.AF_INET, socket.SOCK_DGRAM )  #create socket with defaul params for UDP
        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 2) #allow to reuse addres
        self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 2) #allow broadcast
        #self.sock.setblocking(False)# without it also work and i dont know what that line do
        self.sock.bind( ('',self.UDP_PORT) ) #we binding to that port, so we catch all messages coming to this port

    def reg(self): #func for get user name
        print 'input your name:'
        name = raw_input()
        return name

    def getMessage(self): # func for catching messages.
        while True:
            try:
                data, addr = self.sock.recvfrom( 1024 ) #get data from binding socket with 1024 bytes size
                if not data is None:
                    lock = threading.Lock()#creating critical section for console, output should be correct
                    with lock:
                        print data
            except: pass

    def run(self):
        self.name = self.reg()#get user name
        t = threading.Thread(target=self.getMessage)# creating new thread, in which we runing getMessage
        t.start() #starting thread
        while True: #inf cycle, when ENTER pressed, new message with go to self.UDP_PORT_SEND, in that app self.UDP_SEND ==
            print 'Input message:'
            message = raw_input()#get message
            self.sock.sendto( "{} > {}".format(self.name, message), (self.UDP_IP, self.UDP_PORT_SEND) ) #send message in UDP_IF to port == UDP_PORT_SEND
            threading._sleep(0.1) #main thread sleeping, for creating delay, in what print 'Input message:' creating after new message come КОСТЫЛЬ))

c = Chat()
print c.sock
c.run()