# Filename: socketClient.py    import socket  import sys  import threading    # Client GUI  from tkinter import *  import Pmw        # Create a TCP/IP socket  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  # Connect the socket to the port where the server is listening  server_address = (‘localhost‘, 10000)  print (sys.stderr, ‘connecting to %s port %s‘ % server_address)  sock.connect(server_address)    root = Tk()  # textDisplay    textDisplay = Pmw.ScrolledText(root)    textDisplay.pack(expand=1, padx=5, pady=5,side = LEFT)    # textInput  textInput = Pmw.ScrolledText(root)    textInput.pack(expand=1, padx=5, pady=5,side = LEFT)  # Send Button and its callback    def sendMsg(event):      message = socket.gethostname()+‘:‘+ textInput.get()      #print (sys.stderr, ‘sending "%s"‘ % message)      print(message)      sock.sendall(message.encode())      textInput.clear()      #data = http://www.mamicode.com/sock.recv(100)      #textDisplay.insert(END, data)      #print (sys.stderr, ‘received "%s"‘ % data)        sendBtn = Button(root, text="Send")    sendBtn.bind(‘<Button-1>‘, sendMsg)    sendBtn.pack(side = LEFT)    def receiveMsg():      while True:          data = sock.recv(100)          print (sys.stderr, ‘client received "%s"‘ % data)          textDisplay.insert(END, data)          receiveThread = threading.Thread(name=‘waitForMSG‘, target=receiveMsg)  receiveThread.start()    root.mainloop()  

# Filename: socketServer.py    import socket  import sys    # Create a TCP/IP socket  sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)    # 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)    # Listen for incoming connections  sock.listen(1)    while True:      # Wait for a connection      print (sys.stderr, ‘waiting for a connection‘)      connection, client_address = sock.accept()        try:          print (sys.stderr, ‘connection from‘, client_address)            # Receive the data in small chunks and retransmit it          while True:              data = connection.recv(16)              print (sys.stderr, ‘received "%s"‘ % data)              if data:                  print (sys.stderr, ‘sending data back to the client‘)                  connection.sendall(data)              else:                  print (sys.stderr, ‘no data from‘, client_address)                  break      finally:          # Clean up the connection          connection.close()