1 class Game:
   2     def __init__(self, initialBoard):
   3         self.board = initialBoard
   4     def takeMatches(self, matches, pile):
   5         if matches < 1:
   6             raise MustTakePositiveMatchesError("Get real")
   7         if self.board[pile] < matches:
   8             raise NotEnoughMatchesError("Oh dear: pile " + str(pile) + " not big enough")
   9         self.board[pile] -= matches
  10         nonZeroPiles = [pile
  11                         for pile in self.board
  12                         if pile > 0]
  13         return len(nonZeroPiles) == 0
  14 
  15 class NotEnoughMatchesError(Exception):
  16     pass
  17 class MustTakePositiveMatchesError(Exception):
  18     pass