Python实现A*算法解决八数码问题。

输入为九个数字的列表，代表八个数的位置（Z字型方向），空位以-1代替。

输出为各移动步骤得到的九个数的矩阵（输出到屏幕）。

使用是调用answer函数。返回一个各移动步骤得到的九个数的矩阵的列表。-Python achieving eight A* algorithm to solve digital problems. Enter a list of the nine numbers represent the number eight position (Z fonts direction), the space to-1 instead. Output for the mobile number of steps to get the nine matrix (output to screen). Use is to call answer function. The move returns a number of steps to get the matrix of the list of nine.