Error in line 59

import random

def shuffle_deck():
    deck = {}
    for i in range(13):
        deck[i] = [(i+2), 'Clubs']
    for i in range(13):
        deck[i+13] = [(i+2), 'Diamonds']
    for i in range(13):
        deck[i+26] = [(i+2), 'Hearts']
    for i in range(13):
        deck[i+39] = [(i+2), 'Spades']

    random.shuffle(deck)
    return deck

def card_name(card):
    if card == 11:
        return 'Jack'
    elif card == 12:
        return 'Queen'
    elif card == 13:
        return 'King'
    elif card == 14:
        return 'Ace'
    else:
        return str(card)

def deal_cards(deck):
    hand1 = {}
    hand2 = {}
    for i in range(52):
        if i % 2 == 0:
            hand1[i/2] = deck.pop(i)
        else:
            hand2[i/2] = deck.pop(i)

    return hand1,hand2

def check_cards(player1, player2):
    if player1 > player2:
        return 'player1'
    elif player1 < player2:
        return 'player2'
    else:
        return 'tied'

deck = shuffle_deck()
hand1,hand2 = deal_cards(deck)
ontable = {None}
hand1won = {None}
hand2won = {None}

# print "Hand 1\tHand2"
# for i in range(26):
#    print "%s of %s\t%s of %s" % (card_name(hand1[i][0]), hand1[i][1], card_name(hand2[i][0]), hand2[i][1])

for i in range(26):
    ontable[len(ontable)] = hand1.pop[i]
    ontable[len(ontable)] = hand2.pop[i]
    print "Player 1 plays the %s of %s." % (card_name(ontable[len(ontable)-1][0]), ontable[len(ontable)-1][1])
    print "Player 2 plays the %s of %s." % (card_name(ontable[len(ontable)][0]), ontable[len(ontable)][1])
    play_winner = check_cards(ontable[len(ontable)-1][0], ontable[len(ontable)][0])
    if play_winner == 'player1':
        print "Player 1 wins the round."
        for x in range(1,len(ontable)):
            hand1won[len(hand1won)] = ontable[i]
    elif play_winner == 'player2':
        print "Player 2 wins the round."
        for x in range(1,len(ontable)):
            hand2won[len(hand2won)] = ontable[i]
    elif play_winner == 'tied':
        print "The players tie for this round and the cards remain on the table."
    print "The score is now Player 1: %r, Player 2: %r" % (len(hand1won-1), len(hand2won-1))

if len(hand1won) > len(hand2won):
    print "Player 1 wins the game!"
elif len(hand1won) < len(hand2won):
    print "Player 2 wins the game!"
else:
    print "Nobody wins. Such is the nature of War."