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''' Minesweeper class - Plays Minesweeper.
It provides methods that carry out most of the needed functionality. It has
the following data structures:
size: Integer. The board is a square Size x Size grid. Default value 5.
mines: Integer. The board contains this many bombs, randomly placed at
start of game. Default value 3.
actualBoard: A list of size lists, each size items long. This represents
the current game state. Possible list contents:
'M': This cell contains a mine (bomb).
0-8: An integer, giving the number of mines in this cell's
playerBoard: A list of lists, the same size as ActualBoard, containing
the board as it will be displayed to the player. Possible contents:
'H': This cell is hidden and can be turned over.
0-8: This cell has this many mines in its neighborhood.
'X': Used if the player loses, this shows the location of a mine.
gameState: Has 3 possible states: "win", "loss", "playing" (These are
def __init__(self, sideSize = 5, mines = 3):
''' Initializer. Sets up boards, places mines (via call to method),
counts bombs in neighborhod for each bomb (via call to another method).
In: sideSize of one side of grid, number of mines to be placed.
Interaction with user: None.
Modifications to data structures: ActualBoard is set up, mines
placed, counts updated. PlayerBoard set to all H. GameState set to
Errors handled: If SideSize <= 2, a value of 2 is used.
If SideSize > 15, a value of 15 is used.
If Mines is greater than the number of cells in the grid, every cell
is given a bomb and any excess is ignored.
If Mines < 0, a value of 0 is used.
if sideSize <= 2:
sideSize = 2
elif sideSize > 15:
sideSize = 15
if mines < 0:
mines = 0
elif mines > sideSize**2:
mines = sideSize**2
self.size = sideSize
self.mines = mines
self.gameState = 'playing'
self.actualBoard = self.createBoard(0)
self.playerBoard = self.createBoard('H')
def createBoard(self, value):
''' Creates empty board
In: value - default value for filling board
Returns: new board represented by list of lists
Interaction with user: None
Modifications to data structures: Reads self.size to set apropriate
size for board
Errors handled: None
board = 
for i in range(self.size):
board.append([value] * self.size)
''' Puts mines onto ActualBoard.
Interaction with user: None.
Modifications to data structures: Reads self.size and self.mines to
handle setup. Randomly selects location for self.mines mines to be
placed. Calls self.getCounts() to finish setting up ActualBoard.
Errors handled: None (input was screened in __init__()). Note that
this method must make sure that each mine is placed in a separate
cell; that is, if a mine is about to be placed in a cell that
already has a mine in it, another cell should be picked instead.
mineLocations = [''] * (self.size**2 - self.mines)
mineLocations += ['M'] * self.mines
for i, m in enumerate(mineLocations):
if m == 'M':
r = i // self.size
c = i % self.size
self.actualBoard[r][c] = 'M'