import socket
import sys

s = socket.socket()
s.bind(("localhost",9999))
s.listen(10) # Acepta hasta 10 conexiones entrantes.

i=1
while True:
    sc, address = s.accept()

    print (address)
    f = open('file_'+ str(i)+'.txt','wb') # Open in binary
    i=i+1
    l = sc.recv(1024)
    while (l):
        f.write(l)
        l = sc.recv(1024)
    f.close()
    sc.close()
s.close()