大爽Python入门教程 7-2 面向对象编程 使用类`class`组织代码
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在之前的,第六章第9小节,实现了一个井字棋小游戏。
其代码是面向过程的,换言之使用函数来组织的。
这里我们把这个游戏,功能不变,换种写法。
使用类来重新组织下代码。
这种写法是不唯一的,有非常多种写法,以下本人只是展示了一种,供大家参考。
1 思路分析
这里用一个类去实现,直接给其起名为Game
这个Game
类
应该有以下属性
board
: 存储棋盘棋子信息的二维列表current
: 当前玩家棋子符号。
应该有以下方法
generate_board
: 生成board
show_board
: 展示board
check_bunch_match
: 检查某一串是否全部为当前棋子check_win
: 检查当前玩家是否胜利
(当前玩家落子能否连成一条线)place
: 放置棋子turn
: 切换玩家parse_rc
: 解析用户输入命令中的行与列run
: 运行游戏
2 代码框架
初步代码框架如下
WELCOME = "Welcome to Tic-Tac-Toe!"
ENTER = "%s's turn. Enter row index and column index to place (ri, ci):\n"
Invalid = "Invalid command."
Used = "The place is already occupied."
class Game:
def __init__(self):
self.board = []
self.current = "X"
def generate_board(self):
pass
def show_board(self):
pass
def check_bunch_match(self, bunch):
return False
def check_win(self):
return False
def place(self, ri, ci):
return True
def turn(self):
pass
def parse_rc(self, cmd):
return -1, -1
def run(self):
while True:
pass
game = Game()
game.run()
3 总代码
将上面框架中的方法,逐步实现后如下
WELCOME = "Welcome to Tic-Tac-Toe!"
ENTER = "%s's turn. Enter row index and column index to place (ri, ci):\n"
Invalid = "Invalid command."
Used = "The place is already occupied."
class Game:
def __init__(self):
self.generate_board()
self.current = "X"
def generate_board(self):
self.board = [
[" " for ci in range(3)] for ri in range(3)
]
def show_board(self):
for ri, row in enumerate(self.board):
row_str = ""
for ci, cell in enumerate(row):
row_str += " %s " % cell
if ci != 2:
row_str += "|"
print(row_str)
if ri != 2:
print("---+---+---")
def check_bunch_match(self, bunch):
res = True
for one in bunch:
if one != self.current:
res = False
break
return res
def check_win(self):
r, c = len(self.board), len(self.board[0])
for ri in range(r):
row = self.board[ri]
if self.check_bunch_match(row):
return True
for ci in range(c):
column = [self.board[ri][ci] for ri in range(r)]
if self.check_bunch_match(column):
return True
diagonal_1 = [self.board[ri][ri] for ri in range(r)]
diagonal_2 = [self.board[ri][c - ri - 1] for ri in range(r)]
if self.check_bunch_match(diagonal_1):
return True
if self.check_bunch_match(diagonal_2):
return True
return False
def place(self, ri, ci):
if self.board[ri][ci] != " ":
return False
self.board[ri][ci] = self.current
return True
def turn(self):
if self.current == "X":
self.current = "O"
else:
self.current = "X"
def parse_rc(self, cmd):
rc = cmd.split(",")
if len(rc) == 2:
ri, ci = rc
ri = ri.strip()
ci = ci.strip()
if ci.isdigit() and ri.isdigit():
ci = int(ci)
ri = int(ri)
if 0 <= ci < 3 and 0 <= ri < 3:
return ri, ci
return -1, -1
def run(self):
print(WELCOME)
while True:
self.show_board()
cmd = input(ENTER % self.current)
ri, ci = self.parse_rc(cmd)
if ri >= 0:
res = self.place(ri, ci)
if res:
if self.check_win():
self.show_board()
print("%s win!" % self.current)
return
self.turn()
else:
print(Used)
else:
print(Invalid)
game = Game()
game.run()
运行效果和原来的(第六章第九节)是一样的,
这里就不额外展示了。
标签:ci,return,Python,大爽,ri,board,面向对象编程,self,def 来源: https://www.cnblogs.com/BigShuang/p/15717474.html