Black Jack game

BlackJack.py

from random import randint
import datetime

score = 100
round = 1

#date and time included in high scores
now = datetime.datetime.now()
today = datetime.date.today()
numericalDate = "%d/%d/%d" % (today.day, today.month, today.year)

def add_high_score(playerName, score):
	filename = open("blackjack_highscores.txt", 'r+').read()
	highScores_evaluated = eval(filename)
	if score > highScores_evaluated[1] :
		print "New HighScore!, congrats %s" % playerName
		highScores[1] = [playerName, score, numericalDate]
		#FIND A WAY TO ALLOW PROGRAM TO CHANGE VALUE OF HIGHSCORE WITHOUT using "w+" and erasing
		#other scores
		filename.write(str(highScores[1])) 
		filename.close()
		
	else:
		highScores = {}
		for ranks in range(1, 11):
			#create ranking system 
			if ranks == 1:
				highScores[ranks] = [playerName, score, numericalDate]
			else:
				#default values
				playerName = "MontyCheese"
				score = 0
				highScores[ranks] = [playerName, score, numericalDate]
				#return highScores
		filename.write(str(highScores)) 
		filename.close()

def check_high_score():
	pass # create later to check high scores
	
def create_deck():
	deck = []
	for number in range(2,12):
		if number == 11:
			for x in range(4): #looping to get 4 values of each card.
				deck.append("Jack")
				deck.append("Queen")
				deck.append("King")
				deck.append("Ace")
		else:
			for x in range(4): #looping to get 4 values of each card.
				deck.append(number) 
	return deck
		
class Deck(object):
	def __init__(self, deck):
		self.deck = deck
		self.size = len(create_deck())
	
	#method to deal a random card from deck	
	def deal_card(self):
		return self.deck[randint(0, self.size - 1)]
	
	#method that takes face card string values and returns their equivalencies
	def face_card_rank(self, card):
		if card == "Jack":
			return 10
		elif card == "Queen":
			return 10
		elif card == "King":
			return 10
		elif card == "Ace":
			return 1
		#default for non-face cards
		else: 
			return card
		
class Game(Deck):
	def __init__(self, playerName, score, round):
		self.playerName = playerName
		self.score = score
		self.round = round
	
	def first_round(self, card1, card2):
		if self.round == 6:
			print "Thanks for playing %s, your total score is %d" % (self.playerName, self.score)
		else:
			print "\nRound %d" % self.round
			print "Dealer deals:\n" + str(card1) + " " + str(card2)
			
			if (card1 == "Ace" and type(card2) == type(str())) or (card2 == "Ace" and type(card1) == type(str())):
				print "BLACKJACK!"  
				playAgain = raw_input("Another round? (Y/N): ")
				if playAgain.upper() == "Y":
					self.round += 1 
					return self.first_round(newDeck.deal_card(), newDeck.deal_card())
				else:
					print "Thanks for playing, your final score is %d" % self.score
					
			else:
				if type(card1) == type(str()) or type(card2) == type(str()):
					return self.decision_making(self.round, newDeck.face_card_rank(card1) + newDeck.face_card_rank(card2))  
					#call face_card_rank method to convert face cards to integer value
				else:
					return self.decision_making(self.round, card1 + card2)

			
	def consecutive_round(self, round, roundPoints):
		nextCard = newDeck.deal_card()
		
		print "\nRound %d" % self.round
		print "You've been dealt a %s" % str(nextCard)
		
		if roundPoints + newDeck.face_card_rank(nextCard) > 21:
			print "You went over 21, you've lost this round! \nyour total was %d" % (roundPoints + newDeck.face_card_rank(nextCard))
			self.score -= 21
			playAgain = raw_input("Another round? (Y/N): ")
			if playAgain.upper() == "Y":
				self.round += 1 
				return self.first_round(newDeck.deal_card(), newDeck.deal_card())
			else:
				print "Thanks for playing, your final score is %d" % self.score
		elif roundPoints + newDeck.face_card_rank(nextCard) == 21:
			print "Congrats, you have 21 this round! Your score remains the same!"
			playAgain = raw_input("Another round? (Y/N): ")
			if playAgain.upper() == "Y":
				self.round += 1 
				return self.first_round(newDeck.deal_card(), newDeck.deal_card())
			else:
				print "Thanks for playing, your final score is %d" % self.score
		elif roundPoints + newDeck.face_card_rank(nextCard) < 21:
			return self.decision_making(self.round, roundPoints + newDeck.face_card_rank(nextCard))
		else:
			print "Error occured, shutting down program."
			
	def decision_making(self, round, roundPoints):
		print "The combined sum of your cards is %d, do you want to hit or stay?" % roundPoints
		choice = raw_input("Type \"Hit\" or \"Stay\": ")
		if choice.upper() == "HIT":
			return self.consecutive_round(round, roundPoints)
		elif choice.upper() == "STAY":
			self.score -= 21 - roundPoints
			print "You had %d this round" % roundPoints
			if self.round == 5:
				print "Thanks for playing %s, your total score is %d" % (self.playerName, self.score)
			else:
				playAgain = raw_input("Another round? (Y/N): ")
				if playAgain.upper() == "Y":
					self.round += 1 
					return self.first_round(newDeck.deal_card(), newDeck.deal_card())
				else:
					print "Thanks for playing, your final score is %d" % self.score
	

		
		
if __name__ == "__main__":
	newDeck = Deck(create_deck())
	###_____________________________________start game interface###
	print "Hello, welcome to BlackJack"
	playerName = raw_input("What is your name?: ") 
	
	### Testing in progress..
	#if playerName == "Test":
	#	add_high_score(playerName, 84)
	#else:
	#	True
	###	
	newGame = Game(playerName, score, round)
	newGame.first_round(newDeck.deal_card(), newDeck.deal_card())

Need help w/ check_high_score() method and add_high_score() method