a3

"""A board is a list of list of str. For example, the board
    ANTT
    XSOB
is represented as the list
    [['A', 'N', 'T', 'T'], ['X', 'S', 'O', 'B']]

A word list is a list of str. For example, the list of words
    ANT
    BOX
    SOB
    TO
is represented as the list
    ['ANT', 'BOX', 'SOB', 'TO']
"""


def is_valid_word(wordlist, word):
    """ (list of str, str) -> bool

    Return True if and only if word is an element of wordlist.

    >>> is_valid_word(['ANT', 'BOX', 'SOB', 'TO'], 'TO')
    True
    """
    return word in wordlist


def make_str_from_row(board, row_index):
    """ (list of list of str, int) -> str

    Return the characters from the row of the board with index row_index
    as a single string.

    >>> make_str_from_row([['A', 'N', 'T', 'T'], ['X', 'S', 'O', 'B']], 0)
    'ANTT'
    """
    return ''.join(board[row_index])

def make_str_from_column(board, column_index):
    """ (list of list of str, int) -> str

    Return the characters from the column of the board with index column_index
    as a single string.

    >>> make_str_from_column([['A', 'N', 'T', 'T'], ['X', 'S', 'O', 'B']], 1)
    'NS'
    """
    return "".join([row[column_index] for row in board])


def board_contains_word_in_row(board, word):
    """ (list of list of str, str) -> bool

    Return True if and only if one or more of the rows of the board contains
    word.

    Precondition: board has at least one row and one column, and word is a
    valid word.

    >>> board_contains_word_in_row([['A', 'N', 'T', 'T'], ['X', 'S', 'O', 'B']], 'SOB')
    True
    """
    return (True in [word in make_str_from_row(board, row_index) for row_index in range(len(board))] and [True] or [False])[0]


def board_contains_word_in_column(board, word):
    """ (list of list of str, str) -> bool

    Return True if and only if one or more of the columns of the board
    contains word.

    Precondition: board has at least one row and one column, and word is a
    valid word.

    >>> board_contains_word_in_column([['A', 'N', 'T', 'T'], ['X', 'S', 'O', 'B']], 'NO')
    False
    """
    return (True in [word in make_str_from_column(board, column_index) for column_index in range(len(board[0]))] and [True] or [False])[0]


def board_contains_word(board, word):
    """ (list of list of str, str) -> bool

    Return True if and only if word appears in board.

    Precondition: board has at least one row and one column.

    >>> board_contains_word([['A', 'N', 'T', 'T'], ['X', 'S', 'O', 'B']], 'ANT')
    True
    """
    return board_contains_word_in_row(board, word) or board_contains_word_in_column(board, word)


def word_score(word):
    """ (str) -> int

    Return the point value the word earns.

    Word length: < 3: 0 points
                 3-6: 1 point per character for all characters in word
                 7-9: 2 points per character for all characters in word
                 10+: 3 points per character for all characters in word

    >>> word_score('DRUDGERY')
    16
    """
    return (2 < len(word) < 7 and [len(word) * 1] or [(6 < len(word) < 10 and [len(word) * 2] or [(len(word) > 9 and [len(word) * 3] or [0])[0]])[0]])[0]


def update_score(player_info, word):
    """ ([str, int] list, str) -> NoneType

    player_info is a list with the player's name and score. Update player_info
    by adding the point value word earns to the player's score.

    >>> update_score(['Jonathan', 4], 'ANT')
    """
    player_info[1] += word_score(word)


def num_words_on_board(board, words):
    """ (list of list of str, list of str) -> int

    Return how many words appear on board.

    >>> num_words_on_board([['A', 'N', 'T', 'T'], ['X', 'S', 'O', 'B']], ['ANT', 'BOX', 'SOB', 'TO'])
    3
    """
    return sum([board_contains_word(board, word) for word in words])


def read_words(words_file):
    """ (file open for reading) -> list of str

    Return a list of all words (with newlines removed) from open file
    words_file.

    Precondition: Each line of the file contains a word in uppercase characters
    from the standard English alphabet.
    """
    return list(line.rstrip('\n') for line in words_file)


def read_board(board_file):
    """ (file open for reading) -> list of list of str

    Return a board read from open file board_file. The board file will contain
    one row of the board per line. Newlines are not included in the board.
    """
    return list(list(line.rstrip('\n')) for line in board_file)