问“‘function”对象没有属性“__getitem__”

EN

import random
import time


def board():

    for i in range(0, 8, 1):
        for j in range(0, 10, 1):
            board[i][j] = 0

    return board


def move(board, valid_move):

    start_time = time.time()

    x = 0

    while x == 0:

        i = range(7, -1, -1)
        j = range(0, 10, 1)

        first_move = board[i][j]
        board[7][4] = 1

        if board[i-1][j] == 0:  #above
            first_move = [i, j]
            x = 1
            print " valid above"
            return j

        elif (board[i][j+1] == 0 and (i <= 7 and j <= 9)) or (board[i-1][j+1] == 0 and (i <= 7 and j <= 9)) or (board[i-1][j+1] == 0 and (i <= 7 and j <= 9)):  #right
            first_move = [i, (j+1)]
            x = 1
            print " valid right"
            return (j+1)

        elif board[i][j-1] == 0 or board[i-1][j-1] == 0 or board[i-1][j-1] == 0: #left
            first_move = [i, (j-1)]
            x = 1
            print " valid left"
            return (j-1)

        else:
            r = random.randint(0, 7)
            c = random.randint(0, 9)
            first_move = [r, c]
            x = 1
            print " random move"
            return c

    end_time = time.time() - start_time
    print end_time

    return first_move


File "F:/5. Fifth year/1st Semester/MPR 213 2016/Project 2016/attempts.py", line 20, in board
    board[i][j] = 0

TypeError: 'function' object has no attribute '__getitem__'