Function askForPlayerMove

src/gamesbyexample/chancecheckers.py:187–231

Ask the player to select a move.

(board, player, moves)

def askForPlayerMove(board, player, moves):
    """Ask the player to select a move."""

    # Present the player with valid moves and ask them to choose one:
    assert player in ('X', 'O')
    print('Moves for ' + player + ': ' + ' '.join(moves))

    # Get possible "source" spaces to select:
    checkersThatCanMove = []
    for row in range(1, 9):  # Loop over all the spaces on the board.
        for column in ALL_COLUMNS:
            thisSpace = column + str(row)
            checkerAtSpace = board.get(thisSpace, '')
            cantMove = checkerAtSpace.lower() not in moves
            isPromoted = checkerAtSpace == otherCheckers(player)[1]
            if cantMove or isPromoted:
                continue  # This is not a checker the player can move.

            # See where the checker at this space can move:
            dstMoves, dstCaptures = getPossibleDstMoves(board, thisSpace)
            if dstMoves != [] or dstCaptures != []:
                checkersThatCanMove.append(thisSpace)

    if checkersThatCanMove == []:
        return (None, None)  # There are no valid moves.

    while True:  # Loop until a valid "source" space is selected.
        print('Player', player, 'select the checker to move:')
        print(' '.join(checkersThatCanMove), 'QUIT')
        srcMove = input('> ').upper().strip()
        if srcMove == 'QUIT':
            sys.exit()
        if srcMove in checkersThatCanMove:
            break

    while True:  # Loop until a valid "destination" space is selected.
        dstMoves, dstCaptures = getPossibleDstMoves(board, srcMove)
        dstMoves += dstCaptures
        print('Enter the space to move', srcMove, 'to:')
        print(' '.join(dstMoves))
        dstMove = input('> ').upper().strip()
        if dstMove in dstMoves:
            break

    return (srcMove, dstMove)


def makeMove(board, srcMove, dstMove):