implementation of drop_piece makes no sense

[yunjiangster]

The bound function drop_piece below is basically dropping a piece at the (5, column) coordinate of the board, if (0, column) hasn't been occupied. What's the point of doing that? Isn't it supposed to drop a piece at a general coordinate?

class board():
    def __init__(self):
        self.init_board = np.zeros([6,7]).astype(str)
        self.init_board[self.init_board == "0.0"] = " "
        self.player = 0
        self.current_board = self.init_board

    def drop_piece(self, column):
        if self.current_board[0, column] != " ":
            return "Invalid move"
        else:
            row = 0; pos = " "
            while (pos == " "):
                if row == 6:
                    row += 1
                    break
                pos = self.current_board[row, column]
                row += 1
            if self.player == 0:
                self.current_board[row-2, column] = "O"
                self.player = 1
            elif self.player == 1:
                self.current_board[row-2, column] = "X"
                self.player = 0