#coding=utf-8 import datetime class solution(object): def __init__(self,board): self.b = board self.t = 0 def check(self,x,y,value):#检查每行每列及每宫是否有相同项 for row_item in self.b[x]: if row_item == value: return False for row_all in self.b: if row_all[y] == value: return False row,col=x/3*3,y/3*3 row3col3=self.b[row][col:col+3]+self.b[row+1][col:col+3]+self.b[row+2][col:col+3] for row3col3_item in row3col3: if row3col3_item == value: return False return True def get_next(self,x,y):#得到下一个未填项 for next_soulu in range(y+1,9): if self.b[x][next_soulu] == 0: return x,next_soulu for row_n in range(x+1,9): for col_n in range(0,9): if self.b[row_n][col_n] == 0: return row_n,col_n return -1,-1 #若无下一个未填项,返回-1 def try_it(self,x,y):#主循环 if self.b[x][y] == 0: for i in range(1,10):#从1到9尝试 self.t+=1 if self.check(x,y,i):#符合 行列宫均无条件 的 self.b[x][y]=i #将符合条件的填入0格 next_x,next_y=self.get_next(x,y)#得到下一个0格 if next_x == -1: #如果无下一个0格 return True #返回True else: #如果有下一个0格,递归判断下一个0格直到填满数独 end=self.try_it(next_x,next_y) if not end: #在递归过程中存在不符合条件的,即 使try_it函数返回None的项 self.b[x][y] = 0 #回朔到上一层继续 else: return True def start(self): begin = datetime.datetime.now() if self.b[0][0] == 0: self.try_it(0,0) else: x,y=self.get_next(0,0) self.try_it(x,y) for i in self.b: print i end = datetime.datetime.now() print '\ncost time:', end - begin print 'times:',self.t return s=solution([[8,0,0,0,0,0,0,0,0], [0,0,3,6,0,0,0,0,0], [0,7,0,0,9,0,2,0,0], [0,5,0,0,0,7,0,0,0], [0,0,0,8,4,5,7,0,0], [0,0,0,1,0,0,0,3,0], [0,0,1,0,0,0,0,6,8], [0,0,8,5,0,0,0,1,0], [0,9,0,0,0,0,4,0,0]]) 73 s.start()
[8, 1, 2, 7, 5, 3, 6, 4, 9] [9, 4, 3, 6, 8, 2, 1, 7, 5] [6, 7, 5, 4, 9, 1, 2, 8, 3] [1, 5, 4, 2, 3, 7, 8, 9, 6] [3, 6, 9, 8, 4, 5, 7, 2, 1] [2, 8, 7, 1, 6, 9, 5, 3, 4] [5, 2, 1, 9, 7, 4, 3, 6, 8] [4, 3, 8, 5, 2, 6, 9, 1, 7] [7, 9, 6, 3, 1, 8, 4, 5, 2] cost time: .060687 times: 45360
可以看到程序虽然运算次数比较多,但是速度还是很快的。
以上就是python实现解数独程序的示例代码分享的详细内容,更多请关注Gxl网其它相关文章!
查看更多关于python实现解数独程序的示例代码分享的详细内容...
声明:本文来自网络,不代表【好得很程序员自学网】立场,转载请注明出处:http://haodehen.cn/did82444