Send binary files via Socket

//server.py

#!/usr/bin/python

import socket
import sys

s = socket.socket()
host = socket.gethostname()
port = 12345
s.bind((host, port))

s.listen(5)
while True:
    sc, address = s.accept()

    print address
    i=1
    f = open('file_'+ str(i)+".png",'wb')
    i=i+1
    while (True):
        l = sc.recv(1024)
        while (l):
                f.write(l)
                l = sc.recv(1024)
    f.close()


    sc.close()

s.close()


//client.py

#!/usr/bin/python

import socket
import sys

s = socket.socket()
host = socket.gethostname()
port = 12345

s.connect((host, port))
f=open ("test.png", "rb")
l = f.read(1024)
while (l):
    s.send(l)
    l = f.read(1024)
s.close