add example tcp/udp communication using socket

socket/UdpServer.py

@@ -0,0 +1,21 @@
+import socket
+import sys
+
+# Create a TCP/IP socket
+sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+
+# Bind the socket to the port
+server_address = ('localhost', 10000)
+print >>sys.stderr, 'starting up on %s port %s' % server_address
+sock.bind(server_address)
+
+while True:
+    print >>sys.stderr, '\nwaiting to receive message'
+    data, address = sock.recvfrom(4096)
+    
+    print >>sys.stderr, 'received %s bytes from %s' % (len(data), address)
+    print >>sys.stderr, data
+    
+    if data:
+        sent = sock.sendto(data, address)
+        print >>sys.stderr, 'sent %s bytes back to %s' % (sent, address)