Python小项目之五子棋

1.项目简介

在刚刚学习完python套接字的时候做的一个五子棋小游戏，可以在局域网内双人对战，也可以和电脑对战

2.实现思路

• 局域网对战

对于局域网功能来说，首先建立连接（tcp），然后每次下棋时将棋子的坐标发送给对方，当接收到坐标后实例化成棋子对象，这个接收时用了select函数，因为pygame需要循环渲染图片，所以要用非阻塞方式接收消息

select()的机制中提供一fd_set的数据结构，实际上是一long类型的数组， 每一个数组元素都能与一打开的文件句柄（不管是Socket句柄，还是其他文件或命名管道或设备句柄）建立联系，建立联系的工作由程序员完成， 当调用select()时，由内核根据IO状态修改fd_set的内容，由此来通知执行了select()的进程哪一Socket或文件可读或可写，主要用于Socket通信当中

主要代码如下：

         # 接收cli的消息
         if is_people:
             rs, ws, es = select.select(inputs, [], [], 0)
             for r in rs:
                 if r is tcpclisock:
                     try:
                         data = r.recv(BUFSIZ)
                         islink = True
                         print(data.decode('utf8'))
                         if data.decode('utf8') == 'again':
                             is_recieve1 = True
                         if data.decode('utf8') == 'yes':
                             is_playagain = True
                             is_play = True
                         if data.decode('utf8') == 'no':
                             is_recieve2 = True
                             islink = False
                         if not is_play and not result:
                             me = storn.Storn_Black(eval(data))
                             black_chesses.append(me)
                             chesses.append(me)
                             is_play = True
                     except error:
                         islink = False

• 电脑对战

电脑对战的思路也很简单，用了应该是最常见的也是最简单的方法，就是循环遍历棋盘的每一个点，判断该点的价值，选取价值最大的点落子，这个需要对五子棋的棋型有一定了解，这里介绍几种常见的棋型（约定1为己方棋子，2为对方棋子，0为空）

1. 活四（011110）：这时候四颗棋子相连，同时两端为空，已经阻止不了一方的胜利了，此时价值应该设置最高
2. 死四（011112|10111|11011）：四颗棋子，只有一个地方能形成连五，如果是自己的棋可以赢，是对方的也可以阻止对方赢棋，此时价值次高

　　　。。。

就这样把每种棋型判断一下，获得该点的价值，主要代码如下：

 # 判断每个点的价值
 def point_value(pos, white_chesses, black_chesses, identify1, identify2):
     value = 0
     for i in range(1,9):
         # *1111_ 活四
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 5, white_chesses, black_chesses) == 0:
             value += 40000
         # *11112 死四1
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 5, white_chesses, black_chesses) == identify2:
             value += 30000
         # 1*111 死四2
         if get_point(pos, i, -1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1:
             value += 30000
         # 11*11 死四3
         if get_point(pos, i, -2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, -1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1:
             value += 30000
         # *111_ 活三1
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == 0:
             value += 20000
         # *1_11_ 活三2
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 5, white_chesses, black_chesses) == 0:
             value += 20000
         # *1112 死三1
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == identify2:
             value += 15000
         # _1_112 死三2
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 5, white_chesses, black_chesses) == identify2:
             value += 15000
         # _11_12 死三3
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 5, white_chesses, black_chesses) == identify2:
             value += 15000
         # 1__11 死三4
         if get_point(pos, i, -1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 1, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1:
             value += 15000
         # 1_1_1 死三5
         if get_point(pos, i, -1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1:
             value += 15000
         # 2_111_2 死三6
         if get_point(pos, i, -1, white_chesses, black_chesses) == identify2 and \
             get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 5, white_chesses, black_chesses) == identify2:
             value += 15000
         # __11__ 活二1
         if get_point(pos, i, -1, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == 0:
             value += 1000
         # _1_1_ 活二2
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 4, white_chesses, black_chesses) == 0:
             value += 1000
         # *1__
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == 0 and \
             get_point(pos, i, 3, white_chesses, black_chesses) == 0:
             value += 30
         # *1_
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1 and \
             get_point(pos, i, 2, white_chesses, black_chesses) == 0:
             value += 20
         # *1
         if get_point(pos, i, 1, white_chesses, black_chesses) == identify1:
             value += 10
     return value

电脑选择落子位置时，要判断是进攻还是防守，需要两次遍历棋盘，获取进攻时的最大价值和防守的最大价值，主要代码如下：

 # 电脑选取落子的位置
 def ai(white_chesses, black_chesses, chesses):
     value = max1 = max2 = 0
     pos1 = pos2 = ()
     # 进攻时
     for i in range(0,15):
         row = 28 + i * 40
         for j in range(0,15):
             col = 28 + j * 40
             pos = (row,col)
             if is_empty(pos, chesses):
                 continue
             value = point_value(pos, white_chesses, black_chesses, 1, 2)
             if value > max1:
                 max1 = value
                 pos1 = (row,col)

     # 防守时
     for i in range(0,15):
         for j in range(0,15):
             row = 28 + i * 40
             col = 28 + j * 40
             if is_empty((row,col), chesses):
                 continue
             value = point_value((row,col), white_chesses, black_chesses, 2, 1)
             if value > max2:
                 max2 = value
                 pos2 = (row,col)
     if max1 > max2:
         return pos1
     else:
         return pos2

3.游戏截图

源代码地址：https://github.com/tctctctctc/python- 欢迎star

有不足之处还请指正