用Python3写一个中国象棋游戏
作者：互联网
一：目的
就是为了熟悉Python语法
二：效果
三：使用方式
1.用Python3运行里面的main.py即可；
2.wdsa和上右下左键控制光标移动；空格键选中棋子，再按则是相当于移动棋子，如果在原地再按空格键取消选中；
3.按q结束游戏，或者吃了主帅后结束游戏
四：源码
https://github.com/silentdoer/chinese_chess_python3
支持Linux和Windows（我这边用ubuntu18.04和Win10 Powershell测试的，如果是其他终端不能保证布局会像GIF中的那样整齐，但是功能肯定是没问题的）
五：源码介绍
1.首先需要一个能够实时获取按键的工具方法/工具类，否则每次按完上下左右等功能按键后都要按Enter键太不方便，代码如下：
class Getch():
""" 用来实现不需要按enter键读取输入字符 """
def __init__(self):
import platform
system_name = platform.system()
if system_name == 'Windows':
self.impl = GetchWindows()
else: # 默认是Linux（目前就支持Windows和Linux即可）
self.impl = GetchUnix()
def __call__(self): return self.impl()
class GetchUnix:
def __init__(self):
pass
def __call__(self):
# 不要用import sys, tty这种逗号的方式导入
import sys
import tty
import termios
fd = sys.stdin.fileno()
old_settings = termios.tcgetattr(fd)
try:
tty.setraw(sys.stdin.fileno())
ch = sys.stdin.read(1)
finally:
termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
return ch
class GetchWindows:
def __init__(self):
pass
def __call__(self):
import msvcrt
return msvcrt.getch()
通过getch()就能实时获取按下的按键
2.通过一个公共模块来实现清屏和打印颜色文本的操作，代码如下：
def printc(new_line, content, forecolor='', backcolor=''):
if forecolor != '':
forecolor = ';' + forecolor
if backcolor != '':
backcolor = ';' + backcolor
flag = ''
if new_line:
flag = '\n'
print('\033[0' + forecolor + backcolor + 'm' + content + '\033[0m', end=flag)
def clear_console():
import platform
import os
system_name = platform.system()
if system_name == 'Windows':
os.system("cls")
else: # 默认是Linux（目前就支持Windows和Linux即可）
os.system("clear")
3.定义一些常量，主要用于描述阵营，棋子类型（如象，馬，車等），颜色常量，代码如下：
CAMP_RED = '红方' CAMP_WHITE = '白方' CAMP_NONE = 'NONE' CAMP_CURSOR = 'CURSOR' FORE_RED = '31' FORE_YELLOW = '33' FORE_BLUE = '34' FORE_WHITE = '37' BACK_BLACK = '40' CHESS_CHE = 1 CHESS_MA = 2 CHESS_XIANG = 3 CHESS_SHI = 4 CHESS_BOSS = 5 CHESS_PAO = 6 CHESS_BING = 7 # 普通的＊ CHESS_PIECE = 8 CHESS_CURSOR = 9
4.然后我们需要定义棋子类，这里因为想熟悉Python语法，所以拆成了Chess和ChineseChess来做用来熟悉继承，代码如下：
class Piece:
""" 定义棋子基类 """
def __init__(self, pic):
self._pic = pic
def show(self, new_line=False):
if new_line:
print(self._pic)
else:
print(self._pic, end='')
# coding:utf-8
import piece
import constants
import common
class ChessPiece(piece.Piece):
"""
定义象棋棋子
"""
__camp = ''
__type = ''
def __init__(self, pic, camp):
piece.Piece.__init__(self, pic)
self.__camp = camp
def get_camp(self):
return self.__camp
def get_pic(self):
return self._pic
def set_camp(self, camp):
self.__camp = camp
def set_pic(self, pic):
self._pic = pic
def set_type(self, chess_type):
self.__type = chess_type
def get_type(self):
return self.__type
def show(self, new_line=False):
if self.__camp == constants.CAMP_RED:
common.printc(new_line, self._pic, constants.FORE_RED)
elif self.__camp == constants.CAMP_WHITE:
common.printc(new_line, self._pic, constants.FORE_WHITE)
elif self.__camp == constants.CAMP_CURSOR:
common.printc(new_line, self._pic, constants.FORE_YELLOW)
else:
common.printc(new_line, self._pic, constants.FORE_BLUE)
5.接下来就是游戏环境类了，这个类比较大，也是关键，线上代码后面会讲一下思路：
# coding:utf-8
import sys
from chess_piece import ChessPiece
import constants
from getch import Getch
import chess_strategy
import common
class GameContext:
""" 游戏环境类 """
game_over = False
winner = ''
# 是否已经选中棋子
piece_checked = False
# 红方先行
firster = constants.CAMP_RED
_pieces = []
_width = 9
_height = 10
_getch = Getch()
# 字符串默认值可以是''，数组默认值是[]，字典默认值是{}，数值默认值是0，而对象默认值是None
_cursor_original_backup = None
_cursor_loc = {'x': 4, 'y': 1}
# 用于记录checked后，被checked的piece的坐标，用于判定是否是取消checked
_checked_loc = {}
_checked = False
CURSOR_CHECKED = ' 〠 '
CURSOR_UNCHECKED = ' 〄 '
PIECE_NONE = ' ＊ '
strategies = None
def __init__(self, camp=constants.CAMP_RED):
if camp == constants.CAMP_WHITE:
self._cursor_loc['y'] = 8
elif camp != constants.CAMP_RED:
print('阵营参数错误，游戏退出')
exit()
self.firster = camp
# init pieces
# init NONE Camp
for y in range(self._height):
line = []
for x in range(self._width):
tmp = ChessPiece(self.PIECE_NONE, constants.CAMP_NONE)
tmp.set_type(constants.CHESS_PIECE)
line.append(tmp)
self._pieces.append(line)
del line
# init RED Camp and Pic
for idx in range(self._width):
self._pieces[0][idx].set_camp(constants.CAMP_RED)
self._pieces[0][0].set_pic(' 車 ')
self._pieces[0][0].set_type(constants.CHESS_CHE)
self._pieces[0][1].set_pic(' 馬 ')
self._pieces[0][1].set_type(constants.CHESS_MA)
self._pieces[0][2].set_pic(' 象 ')
self._pieces[0][2].set_type(constants.CHESS_XIANG)
self._pieces[0][3].set_pic(' 士 ')
self._pieces[0][3].set_type(constants.CHESS_SHI)
self._pieces[0][4].set_pic(' 將 ')
self._pieces[0][4].set_type(constants.CHESS_BOSS)
self._pieces[0][5].set_pic(' 士 ')
self._pieces[0][5].set_type(constants.CHESS_SHI)
self._pieces[0][6].set_pic(' 象 ')
self._pieces[0][6].set_type(constants.CHESS_XIANG)
self._pieces[0][7].set_pic(' 馬 ')
self._pieces[0][7].set_type(constants.CHESS_MA)
self._pieces[0][8].set_pic(' 車 ')
self._pieces[0][8].set_type(constants.CHESS_CHE)
# 上面的camp已经通过循环统一设置过了
self._pieces[2][1].set_pic(' 炮 ')
self._pieces[2][1].set_type(constants.CHESS_PAO)
self._pieces[2][1].set_camp(constants.CAMP_RED)
self._pieces[2][7].set_pic(' 炮 ')
self._pieces[2][7].set_type(constants.CHESS_PAO)
self._pieces[2][7].set_camp(constants.CAMP_RED)
self._pieces[3][0].set_pic(' 卒 ')
self._pieces[3][0].set_type(constants.CHESS_BING)
self._pieces[3][0].set_camp(constants.CAMP_RED)
self._pieces[3][2].set_pic(' 卒 ')
self._pieces[3][2].set_type(constants.CHESS_BING)
self._pieces[3][2].set_camp(constants.CAMP_RED)
self._pieces[3][4].set_pic(' 卒 ')
self._pieces[3][4].set_type(constants.CHESS_BING)
self._pieces[3][4].set_camp(constants.CAMP_RED)
self._pieces[3][6].set_pic(' 卒 ')
self._pieces[3][6].set_type(constants.CHESS_BING)
self._pieces[3][6].set_camp(constants.CAMP_RED)
self._pieces[3][-1].set_pic(' 卒 ')
self._pieces[3][-1].set_type(constants.CHESS_BING)
self._pieces[3][-1].set_camp(constants.CAMP_RED)
# init WHITE Camp and Pic
for idx in range(self._width):
self._pieces[-1][idx].set_camp(constants.CAMP_WHITE)
self._pieces[-1][0].set_pic(' 車 ')
self._pieces[-1][0].set_type(constants.CHESS_CHE)
self._pieces[-1][1].set_pic(' 馬 ')
self._pieces[-1][1].set_type(constants.CHESS_MA)
self._pieces[-1][2].set_pic(' 相 ')
self._pieces[-1][2].set_type(constants.CHESS_XIANG)
self._pieces[-1][3].set_pic(' 仕 ')
self._pieces[-1][3].set_type(constants.CHESS_SHI)
self._pieces[-1][4].set_pic(' 帥 ')
self._pieces[-1][4].set_type(constants.CHESS_BOSS)
self._pieces[-1][5].set_pic(' 仕 ')
self._pieces[-1][5].set_type(constants.CHESS_SHI)
self._pieces[-1][6].set_pic(' 相 ')
self._pieces[-1][6].set_type(constants.CHESS_XIANG)
self._pieces[-1][7].set_pic(' 馬 ')
self._pieces[-1][7].set_type(constants.CHESS_MA)
self._pieces[-1][8].set_pic(' 車 ')
self._pieces[-1][8].set_type(constants.CHESS_CHE)
# 上面的camp已经通过循环统一设置过了
self._pieces[-3][1].set_pic(' 砲 ')
self._pieces[-3][1].set_type(constants.CHESS_PAO)
self._pieces[-3][1].set_camp(constants.CAMP_WHITE)
self._pieces[-3][7].set_pic(' 砲 ')
self._pieces[-3][7].set_type(constants.CHESS_PAO)
self._pieces[-3][7].set_camp(constants.CAMP_WHITE)
self._pieces[-4][0].set_pic(' 兵 ')
self._pieces[-4][0].set_type(constants.CHESS_BING)
self._pieces[-4][0].set_camp(constants.CAMP_WHITE)
self._pieces[-4][2].set_pic(' 兵 ')
self._pieces[-4][2].set_type(constants.CHESS_BING)
self._pieces[-4][2].set_camp(constants.CAMP_WHITE)
self._pieces[-4][4].set_pic(' 兵 ')
self._pieces[-4][4].set_type(constants.CHESS_BING)
self._pieces[-4][4].set_camp(constants.CAMP_WHITE)
self._pieces[-4][6].set_pic(' 兵 ')
self._pieces[-4][6].set_type(constants.CHESS_BING)
self._pieces[-4][6].set_camp(constants.CAMP_WHITE)
self._pieces[-4][8].set_pic(' 兵 ')
self._pieces[-4][8].set_type(constants.CHESS_BING)
self._pieces[-4][8].set_camp(constants.CAMP_WHITE)
# init cursor 〄 〠
self._cursor_original_backup: ChessPiece = self._pieces[self._cursor_loc['y']][self._cursor_loc['x']]
tmp = ChessPiece(self.cursor_pic(), constants.CAMP_CURSOR)
tmp.set_type(constants.CHESS_CURSOR)
self._pieces[self._cursor_loc['y']][self._cursor_loc['x']] = tmp
del tmp
self.strategies = chess_strategy.ChessStrategy(self._pieces, True)
def show_map(self):
for y in range(self._height):
for x in range(self._width):
self._pieces[y][x].show()
if y == 4:
print()
# 楚汉分割线
print('***********************************')
else:
print('\n')
def clear_map(self):
return common.clear_console()
def cursor_move(self, p_target):
self._pieces[self._cursor_loc['y']][self._cursor_loc['x']] = self._cursor_original_backup
self._cursor_original_backup = self._pieces[p_target['y']][p_target['x']]
tmp = ChessPiece(self.cursor_pic(), constants.CAMP_CURSOR)
tmp.set_type(constants.CHESS_CURSOR)
self._pieces[p_target['y']][p_target['x']] = tmp
self._cursor_loc = p_target
# 刷新地图
self.clear_map()
self.show_map()
# 参数类型限定和返回值类型限定可以不要【类似ts里可以不要】
def can_move(self, direct: str) -> bool:
if direct == 'w':
if self._cursor_loc['y'] - 1 < 0:
return False
elif direct == 'd':
if self._cursor_loc['x'] + 1 >= self._width:
return False
elif direct == 's':
if self._cursor_loc['y'] + 1 >= self._height:
return False
elif direct == 'a':
if self._cursor_loc['x'] - 1 < 0:
return False
else:
return False
return True
def cursor_pic(self) -> str:
if self._checked:
return self.CURSOR_CHECKED
else:
return self.CURSOR_UNCHECKED
""" Python3里可以手动指定返回值类型，而且参数类型也是可以指定的 """
def control(self) -> None:
while True:
ch = self._getch()
# 清空之前的显示状态
self.clear_map()
# 重新绘制象棋布局
self.show_map()
if ch == 'w' or ch == 'A' or ch == b'w' or ch == b'H':
if self.can_move('w'):
self.cursor_move({'x': self._cursor_loc['x'], 'y': self._cursor_loc['y'] - 1})
print('↑', end='')
elif ch == 'd' or ch == 'C' or ch == b'd' or ch == b'M':
if self.can_move('d'):
self.cursor_move({'x': self._cursor_loc['x'] + 1, 'y': self._cursor_loc['y']})
print('→', end='')
elif ch == 's' or ch == 'B' or ch == b's' or ch == b'P':
if self.can_move('s'):
self.cursor_move({'x': self._cursor_loc['x'], 'y': self._cursor_loc['y'] + 1})
print('↓', end='')
elif ch == 'a' or ch == 'D' or ch == b'a' or ch == b'K':
if self.can_move('a'):
self.cursor_move({'x': self._cursor_loc['x'] - 1, 'y': self._cursor_loc['y']})
print('←', end='')
elif ch.lower() == 'q' or ch == b'q':
print('game quit!')
sys.stdout.flush()
break
elif ch == ' ' or ch == b' ':
if not self._checked:
self.do_check()
print('选中', end='')
else:
self.do_release()
print('释放', end='')
# 判定游戏是否结束
if self.game_over:
print('\ngame over!, 胜利方是:' + self.winner)
sys.stdout.flush()
break
else:
print('无效按键', end='')
# 立刻刷新输入流，否则getch()获取的字符不会立刻显示
sys.stdout.flush()
def can_check(self):
tmp = self._cursor_original_backup.get_camp()
if tmp != constants.CAMP_RED and tmp != constants.CAMP_WHITE:
return False
if self.firster == constants.CAMP_RED and tmp == constants.CAMP_WHITE:
return False
if self.firster == constants.CAMP_WHITE and tmp == constants.CAMP_RED:
return False
return True
def do_check(self):
if self.can_check():
self._checked = ~self._checked
self._pieces[self._cursor_loc['y']][self._cursor_loc['x']].set_pic(self.cursor_pic())
# 复制一份，和Java一样基础类型是值赋值，而对象是引用赋值
self._checked_loc = self._cursor_loc.copy()
self.clear_map()
self.show_map()
def do_release(self):
# 判定是否是取消，是取消则不翻转当前选手
if self._cursor_loc['x'] == self._checked_loc['x'] and self._cursor_loc['y'] == self._checked_loc['y']:
self._checked = ~self._checked
self._pieces[self._cursor_loc['y']][self._cursor_loc['x']].set_pic(self.cursor_pic())
self.clear_map()
self.show_map()
return
if self.can_release():
self._checked = ~self._checked
# 判断游戏是否结束
if self._cursor_original_backup.get_camp() != constants.CAMP_NONE and self._cursor_original_backup.get_type() == constants.CHESS_BOSS:
self.game_over = True
self.winner = self.firster
# 切换释放棋子后的布局
self._cursor_original_backup = self._pieces[self._checked_loc['y']][self._checked_loc['x']]
tmp = ChessPiece(self.PIECE_NONE, constants.CAMP_NONE)
tmp.set_type(constants.CHESS_PIECE)
self._pieces[self._checked_loc['y']][self._checked_loc['x']] = tmp
self._pieces[self._cursor_loc['y']][self._cursor_loc['x']].set_pic(self.cursor_pic())
self.clear_map()
self.show_map()
# 切换选手
self.reverse_role()
""" 策略层，TODO 待完善 """
def can_release(self):
# 初步判定，至少不能吃自己这边的子【Python里函数调用太坑了吧，刚才self._cursor_original_backup.get_camp这种方式居然不报错。。】
if self._cursor_original_backup.get_camp() == self.firster:
return False
# 其他规则
tmp = self._pieces[self._checked_loc['y']][self._checked_loc['x']]
if tmp.get_type() == constants.CHESS_BING:
return self.strategies.bing(tmp, self._checked_loc, self._cursor_loc)
if tmp.get_type() == constants.CHESS_CHE:
return self.strategies.che(self._checked_loc, self._cursor_loc)
if tmp.get_type() == constants.CHESS_PAO:
return self.strategies.pao(self._cursor_original_backup, self._checked_loc, self._cursor_loc)
if tmp.get_type() == constants.CHESS_MA:
return self.strategies.ma(self._checked_loc, self._cursor_loc)
if tmp.get_type() == constants.CHESS_XIANG:
return self.strategies.xiang(tmp, self._checked_loc, self._cursor_loc)
if tmp.get_type() == constants.CHESS_SHI:
return self.strategies.shi(tmp, self._checked_loc, self._cursor_loc)
if tmp.get_type() == constants.CHESS_BOSS:
return self.strategies.boss(tmp, self._cursor_original_backup, self._checked_loc, self._cursor_loc)
return True
def reverse_role(self):
if self.firster == constants.CAMP_RED:
self.firster = constants.CAMP_WHITE
else:
self.firster = constants.CAMP_RED
def start(self):
self.clear_map()
self.show_map()
self.control()
# 和类定义相关的代码就要求空两行，上面是类结束，所以这里需要空两行（当然不是强制的）
if __name__ == '__main__':
game = GameContext()
game.clear_map()
game.show_map()
game.control()
6.接下来是策略模块，用于对各类棋子的移动和吃子进行限制，这个没啥好讲的，根据象棋规则看代码即可：
import math
from chess_piece import ChessPiece
import constants
# 好吧，Python规范里要求类和其他代码之间空两行，而且要求整个文件最后一行是空行，然后#和前面的代码空两个空格
class ChessStrategy:
pieces: []
_height = 0
_width = 0
_red_up = True
_red_line = 4
_white_line = 5
_boss_x_left = 3
_boss_x_right = 5
_boss_y_red = 2
_boss_y_white = 7
# [ChessPiece]限定列表元素类型为ChessPiece
def __init__(self, pieces: [ChessPiece], red_up: bool = True):
self.pieces = pieces
self._height = len(pieces)
self._height = len(pieces[0])
# 红方是否在地图上方，这关乎到兵不能后退等问题
self._red_up = red_up
# 红方和白方的楚河汉界线
if red_up:
self._red_line = 4
self._white_line = 5
self._boss_y_red = 2
self._boss_y_white = 7
else:
self._red_line = 5
self._white_line = 4
self._boss_y_red = 7
self._boss_y_white = 2
""" 是否直着走 """
def is_straight(self, origin: {}, dest: {}) -> bool:
if (origin['x'] - dest['x']) * (origin['y'] - dest['y']) == 0:
return True
""" 兵的阵营，象棋地图，待移动兵的坐标 """
def bing(self, active: ChessPiece, origin: {}, dest: {}):
# 存在斜着走判定
if not self.is_straight(origin, dest):
return False
# 存在移动超过多步判定
if abs(origin['x'] - dest['x']) > 1 or abs(origin['y'] - dest['y']) > 1:
return False
# 不能后退判定和过了河才能左右移动判定
if self._red_up:
if active.get_camp() == constants.CAMP_RED:
if dest['y'] - origin['y'] < 0:
return False
# 过河才能左右移动
if abs(dest['x'] - origin['x']) > 0:
if origin['y'] <= self._red_line:
return False
else:
if dest['y'] - origin['y'] > 0:
return False
# 过了河才能左右移动
if abs(dest['x'] - origin['x']) > 0:
if origin['y'] >= self._white_line:
return False
else: # 红方在下面
if active.get_camp() == constants.CAMP_RED:
if dest['y'] - origin['y'] > 0:
return False
# 过了河才能左右移动
if abs(dest['x'] - origin['x']) > 0:
if origin['y'] >= self._white_line:
return False
else:
if dest['y'] - origin['y'] < 0:
return False
# 过了河才能左右移动
if abs(dest['x'] - origin['x']) > 0:
if origin['y'] <= self._white_line:
return False
return True
""" 車 """
def che(self, origin: {}, dest: {}):
if not self.is_straight(origin, dest):
return False
if abs(origin['x'] - dest['x']) == 1 or abs(origin['y'] - dest['y']) == 1:
return True
# 横着走
if origin['x'] - dest['x'] != 0:
for idx in range(min(origin['x'], dest['x']) + 1, max(origin['x'], dest['x'])):
if self.pieces[dest['y']][idx].get_type() != constants.CHESS_PIECE:
return False
else: # 竖着走
for idx in range(min(origin['y'], dest['y']) + 1, max(origin['y'], dest['y'])):
if self.pieces[idx][dest['x']].get_type() != constants.CHESS_PIECE:
return False
return True
""" 炮 """
def pao(self, dest_piece: ChessPiece, origin: {}, dest: {}):
if not self.is_straight(origin, dest):
return False
middle_count = 0
if origin['x'] - dest['x'] != 0: # 横着走
for idx in range(min(origin['x'], dest['x']) + 1, max(origin['x'], dest['x'])):
if self.pieces[dest['y']][idx].get_type() != constants.CHESS_PIECE:
middle_count += 1
else: # 竖着走
for idx in range(min(origin['y'], dest['y']) + 1, max(origin['y'], dest['y'])):
if self.pieces[idx][dest['x']].get_type() != constants.CHESS_PIECE:
middle_count += 1
if middle_count > 1:
return False
if middle_count == 1 and dest_piece.get_camp() == constants.CAMP_NONE:
return False
if middle_count == 0 and dest_piece.get_camp() != constants.CAMP_NONE:
return False
return True
def ma(self, origin: {}, dest: {}):
# 走日字判断
if abs((origin['x'] - dest['x']) * (origin['y'] - dest['y'])) != 2:
return False
# 拗马脚判断
tmpy = math.trunc((dest['y'] - origin['y'])/2)
tmpx = math.trunc((dest['x'] - origin['x'])/2)
middlex = origin['x'] + tmpx
middley = origin['y'] + tmpy
if self.pieces[middley][middlex].get_camp() != constants.CAMP_NONE:
return False
return True
def xiang(self, active: ChessPiece, origin: {}, dest: {}):
# 判断是否是田字走法
if abs(origin['x'] - dest['x']) != 2 or abs(origin['y'] - dest['y']) != 2:
return False
# 判断是否拗象脚
tmpx = (dest['x'] - origin['x'])//2 + origin['x']
tmpy = (dest['y'] - origin['y'])//2 + origin['y']
if self.pieces[tmpy][tmpx].get_camp() != constants.CAMP_NONE:
return False
# 象不能过河的判断
if self._red_up:
if active.get_camp() == constants.CAMP_RED:
if dest['y'] > self._red_line:
return False
else:
if dest['y'] < self._white_line:
return False
else: # 红方在下面
if active.get_camp() == constants.CAMP_RED:
if dest['y'] < self._red_line:
return False
else:
if dest['y'] > self._white_line:
return False
return True
def shi(self, active: ChessPiece, origin: {}, dest: {}):
# 判断是否走的斜线且距离为1
if abs((dest['x'] - origin['x']) * (dest['y'] - origin['y'])) != 1:
return False
# 判断是否移出左右边界
if dest['x'] < self._boss_x_left or dest['x'] > self._boss_x_right:
return False
# 判断是否移出Y轴边界
if self._red_up:
if active.get_camp() == constants.CAMP_RED:
if dest['y'] > self._boss_y_red:
return False
else:
if dest['y'] < self._boss_y_white:
return False
else: # 红方在下面
if active.get_camp() == constants.CAMP_RED:
if dest['y'] < self._boss_y_red:
return False
else:
if dest['y'] > self._boss_y_white:
return False
return True
def boss(self, active: ChessPiece, dest_piece: ChessPiece, origin: {}, dest: {}):
# 判断是否将帅见面，这种情况下可以移动到对方大本营里吃对方主将
if active.get_type() == constants.CHESS_BOSS and dest_piece.get_type() == constants.CHESS_BOSS and origin['x'] == dest['x']:
middle_count = 0
for idx in range(min(origin['y'], dest['y']) + 1, max(origin['y'], dest['y'])):
if self.pieces[idx][dest['x']].get_type() != constants.CHESS_PIECE:
middle_count += 1
break
if middle_count == 0:
return True
# 判断是否走的直线且距离为1
if abs(dest['x'] - origin['x']) + abs(dest['y'] - origin['y']) != 1:
return False
# 判断是否移出左右边界
if dest['x'] < self._boss_x_left or dest['x'] > self._boss_x_right:
return False
# 判断是否移出Y轴边界
if self._red_up:
if active.get_camp() == constants.CAMP_RED:
if dest['y'] > self._boss_y_red:
return False
else:
if dest['y'] < self._boss_y_white:
return False
else: # 红方在下面
if active.get_camp() == constants.CAMP_RED:
if dest['y'] < self._boss_y_red:
return False
else:
if dest['y'] > self._boss_y_white:
return False
return True
7.最后就是main模块，其实就是创建个游戏环境类然后运行游戏的作用：
# coding:utf-8
import platform
import sys
if __name__ == '__main__':
system = platform.system()
if system == 'Windows':
print('请使用Linux系统，最好是Ubuntu18.x版本，否则其他的控制台输出的布局可能会不整齐')
# exit()
if sys.version_info < (3, 0) or sys.version_info >= (4, 0):
print('请使用Python3.x')
exit()
print("Game started.")
import game_context
import constants
game = game_context.GameContext(constants.CAMP_WHITE)
game.start()
六：源码分析
这里主要分析游戏环境类，这个是整个游戏的关键；
1.象棋的地图是通过二维的ChessPiece数组来实现管理的；通过二维数组来实现打印出棋子、光标、空白，这三种都是ChessPiece，不过是它们的阵营，pic等不同
2.在游戏环境类里通过类属性，记录由谁先行，游戏是否结束，胜利方是谁，是否选中棋子，当前光标位置，选中棋子的位置等数据，用于后续的逻辑判定
3.在init方法里初始化象棋地图，然后每个棋子都自我实现了printc方法来打印自己（包括颜色，文本/pic），以及初始化光标等参数
4.这里实现光标移动原理其实就是getch()获得移动按键后，然后修改_pieces，接着清屏和show_map()，这些方法都在类里可以找到；
5.游戏的控制逻辑在control(self)方法里实现，通过循环调用getch()不断的监听按键输入，然后判断按键类型，如果是方向键则通过cursor_move()方法来实现移动光标，内部通过can_move()来判断是否可以进行方向移动
，比如肯定不能越界；然后判断如果是空格键，表示是要选中棋子或者释放棋子，这里则通过判断当前光标是释放状态还是选中状态来分别执行do_check()和do_release()，在do_check()里通过can_check()来判断是否可以
选中某个piece（因为象棋地图里每个元素都是piece，所以肯定需要判断当前光标所在位置的piece是不是象棋棋子还是空白棋子），选中后光标的图案也会改变；
在do_release()里也是通过can_release()来判断是否可以释放棋子，比如咱们选中了白方棋子，那么释放棋子的地方肯定不能是另一个白方棋子，因为自己人不能吃自己人。。；然后在can_release()里调用策略模块里的策略
，分别对不同类型的棋子进行规则判断，比如炮吃子的话只能隔一个子吃，馬走日且不能拗马脚等等；
6.总结：重要的方法为control()，cursor_move()，can_move()，do_check()，can_check()，do_release()，can_release()，__init()__这些都是主要的业务逻辑判断；
七：其他
这里还有个我用Rust写的俄罗斯方块，不过文章没有写的很全但是代码啥的都在github里了，大家有兴趣可以去看看：https://www.cnblogs.com/silentdoer/p/12160871.html
标签：中国象棋,set,return,游戏,self,pieces,constants,._,Python3 来源： https://www.cnblogs.com/silentdoer/p/12758649.html