21 Card Game 2.0

import random

cards = ['A_Spades','2_Spades','3_Spades','4_Spades','5_Spades','6_Spades','7_Spades','8_Spades','9_Spades','10_Spades','J_Spades','Q_Spades','K_Spades',
          'A_Clubs','2_Clubs','3_Clubs','4_Clubs','5_Clubs','6_Clubs','7_Clubs','8_Clubs','9_Clubs','10_Clubs','J_Clubs','Q_Clubs','K_Clubs',
          'A_Harts','2_Harts','3_Harts','4_Harts','5_Harts','6_Harts','7_Harts','8_Harts','9_Harts','10_Harts','J_Harts','Q_Harts','K_Harts',
          'A_Diamonds','2_Diamonds','3_Diamonds','4_Diamonds','5_Diamonds','6_Diamonds','7_Diamonds','8_Diamonds','9_Diamonds','10_Diamonds','J_Diamonds','Q_Diamonds','K_Diamonds',]

def welcome():
    print"Welccome to the game '21'\n"

def menu():
    print"Make your selection."
    print "[1] - Single Player"
    print "[2] - Multi player"
    print "[3] - EXIT"

    choice = raw_input(": ")

    if choice == "1":
        multi = 0
        user1Name = raw_input("What is player 1's username?\n")
        user2Name = ""
        deal(multi,user1Name,user2Name)
    elif choice == "2":
        multi = 0
        multi += 1
        user1Name = raw_input("What is player 1's username?\n")
        user2Name = raw_input("What is player 2's username?\n")
        deal(multi,user1Name,user2Name)

def deal(multi,user1Name,user2Name):
    user1 = []
    user2 = []
    comp1 = []
    comp2 = []
    changeOpt = "y"
    user1 = userDeal(changeOpt,user1Name)

    if multi == 1:
        changeOpt = "y"
        user2 = userDeal(changeOpt,user2Name)

    comp1Name = "CPU1"
    comp2Name = "CPU2"
    changeOpt = "n"
    comp1 = userDeal(changeOpt,comp1Name)

    if multi == 1:
        changeOpt = "n"
        comp2 = userDeal(changeOpt,comp2Name)

    winner(multi,user1,user2,comp1,comp2,user1Name,user2Name,comp1Name,comp2Name)

def userDeal(changeOpt,name):
    hand = []
    card1 = 0
    card2 = 0
    cardCount = 52
    card1 = random.randrange(0,cardCount)
    del cards[card1]
    cardCount -= 1
    card2 = random.randrange(0,cardCount)
    del cards[card2]
    cardCount -= 1
    hand.append(cards[card1])
    hand.append(cards[card2])
    print "\n" + name + ", your cards are: "
    print hand
    change = raw_input("Change card? y/N:")
    if changeOpt == "y":
        if change.lower() == "y":
            hand = changeCard(hand,name)


    return hand

def changeCard(hand,name):
    print "\nWhich card would you like to change?"
    print hand
    print "Card (A)____Card (B)"
    choice = raw_input("A or B: ")
    if choice.lower() == "a":
        card = 0
        card = random.randrange(0,51)
        del hand[0]
        hand.append(cards[card])
        print "\n" + name + ", your cards are: "
        print hand
    if choice.lower() == "b":
        card = 0
        card = random.randrange(0,51)
        del hand[1]
        hand.append(cards[card])
        print "\n" + name + ", your cards are: "
        print hand
    return hand

def winner(multi,user1,user2,comp1,comp2,user1Name,user2Name,comp1Name,comp2Name):
    user1 = cardVal(user1)
    print"\n%s your score is: %s" % (user1Name ,user1)
    if multi == 1:
        user2 = cardVal(user2)
        print"%s your score is: %s" % (user2Name ,user2)
    comp1 = cardVal(comp1)
    print "CPU1's score is %s" % (comp1)
    if multi == 1:
        comp2 = cardVal(comp2)
        print "CPU2's score is %s" % (comp2)
        print "\nWINNER"
        winner = max(user1,user2,comp1,comp2)
        if winner == user1:
            print "The winner is %s with %s!" % (user1Name,winner)
        if winner == comp1:
            print "The winner is %s with %s!" % (comp1Name,winner)
        if winner == user2:
            print "The winner is %s with %s!" % (user2Name,winner)
        if winner == comp2:
            print "The winner is %s with %s!" % (comp2Name,winner)
    #option to change card here!!
    if multi <1:
        print "\nWINNER"
        winner = max(user1,comp1)
        if winner == user1:
            print "The winner is %s with %s!" % (user1Name,winner)
        if winner == comp1:
            print "The winner is %s with %s!" % (comp1Name,winner)

def cardVal(user):
    cardVal = 0
    cardsTotal = 0
    cardNo = 0
    while cardNo < 2:
        card = user[cardNo][0]
        if card == "A":
            cardVal = 11
        elif card == "2":
            cardVal = 2
        elif card == "3":
            cardVal = 3
        elif card == "4":
            cardVal = 4
        elif card == "5":
            cardVal = 5
        elif card == "6":
            cardVal = 6
        elif card == "7":
            cardVal = 7
        elif card == "8":
            cardVal = 8
        elif card == "9":
            cardVal = 9
        else:
            cardVal = 10

        cardNo += 1
        cardsTotal = cardsTotal + cardVal

    return cardsTotal

welcome()
menu()

print"END!"