client.py

# coding:utf-8

import socket
import threading

outString = ''
inString = ''
nick = ''
# 发送
def DealOut(sock):
    global outString, nick
    while True:
        outString = raw_input()  # 输入
        outString = nick + ':' + outString  # 拼接
        sock.send(outString)  # 发送

# 接收
def DealIn(sock):
    global inString
    while True:
        try:
            inString = sock.recv(1024)
            if not inString:
                break
            if outString != inString:
                print inString
        except:
            break

# socket 服务端和客户端  服务端坚挺 客户端请求 链接确认
nick = raw_input('input your nickname:')
ip = raw_input('input the server ip address:')

# 创建套接字
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  # 创建套接字
sock.connect((ip, 8877))  # 发起请求
sock.send(nick)

# 多线程 接收信息  发送信息
thin = threading.Thread(target=DealIn, args=(sock,))  # 创建接收信息的线程
thin.start()
thout = threading.Thread(target=DealOut, args=(sock,))  # 创建发送信息的线程
thout.start()

server.py

# coding:utf-8
# 服务端
import socket
import threading


con = threading.Condition()  # 条件
HOST = raw_input('input the server ip address:')  # ip地址
port = 8877
data = ''

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  # 创建套接字
print 'Socket created'
s.bind((HOST, port))  # 套接字绑定到ip地址
s.listen(10)  # 监听
print 'Socket now listening'

# 接收的方法
def clientThreadIn(conn, nick):
    global data
    while True:
        try:
            temp = conn.recv(1024)
            if not temp:
                conn.close()
                return
            NotifyAll(temp)
            print data
        except:
            NotifyAll(nick + 'leaves the room!')  # 出现异常就退出
            print data
            return


# 发送的方法
def clientThreadOut(conn, nick):
    global data
    while True:
        if con.acquire():
            con.wait()  # 放弃对资源占有 等待通知
            if data:
                try:
                    conn.send(data)
                    con.release()
                except:
                    con.release()
                    return


def NotifyAll(ss):
    global data
    if con.acquire():  # 获取锁  原子操作
        data = ss
        con.notifyAll()  # 当前线程放弃对资源占有, 通知所有
        con.release()




while True:
    conn, addr = s.accept()  # 接收连接
    print 'Connected with' + addr[0] + ':' + str(addr[1])
    nick = conn.recv(1024)  # 获取用户名
    NotifyAll('Welcome' + nick + 'to the room')
    print data
    print str((threading.activeCount() + 1) / 2) + 'person(s)'
    conn.send(data)
    threading.Thread(target=clientThreadIn, args=(conn, nick)).start()
    threading.Thread(target=clientThreadOut, args=(conn, nick)).start()