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Dealer.py
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# Calculate win score of player. lose score of dealer using MDP like process.
# make a class here or whatever
# function for returning reward of player after stand state.
# called in Player Black Jack MDP
#TODO: Handle doubling on player side
#TODO: Input probability
reward_dict = {}
def rewardPlayer(player_hand_value, dealer_first_card, probability_face_card, is_blackjack):
if(dealer_first_card == 1):
return(reward_player_calculate(player_hand_value, True, 11, probability_face_card, is_blackjack, 1))
else:
return(reward_player_calculate(player_hand_value, False, dealer_first_card, probability_face_card, is_blackjack, 1))
#is_ace_card == True (if ace is treated as 11)
#else False
def reward_player_calculate(player_hand_value, is_ace_card, dealer_hand_value, probability_face_card, is_blackjack, num_cards):
r = 0
config_key = (player_hand_value, is_ace_card, dealer_hand_value, is_blackjack, num_cards)
if config_key in reward_dict:
return reward_dict[config_key]
else:
if(dealer_hand_value > 21):
if(is_ace_card == True):
return(reward_player_calculate(player_hand_value,False,dealer_hand_value-10, probability_face_card, is_blackjack, num_cards))
else:
r = tellReward(player_hand_value, is_ace_card, dealer_hand_value, is_blackjack, num_cards)
reward_dict[config_key] = r
elif(dealer_hand_value >= 17):
r = tellReward(player_hand_value, is_ace_card, dealer_hand_value, is_blackjack, num_cards)
reward_dict[config_key] = r
else:
for i in range(1,11):
if(i == 10):
r += probability_face_card * reward_player_calculate(player_hand_value, is_ace_card, dealer_hand_value+10, probability_face_card, is_blackjack, num_cards+1)
reward_dict[config_key] = r
elif(i == 1):
r += ((1-probability_face_card)/9) * reward_player_calculate(player_hand_value, True, dealer_hand_value+11, probability_face_card, is_blackjack, num_cards+1)
reward_dict[config_key] = r
else:
r += ((1-probability_face_card)/9) * reward_player_calculate(player_hand_value, is_ace_card, dealer_hand_value+i, probability_face_card, is_blackjack, num_cards+1)
reward_dict[config_key] = r
return(r)
def tellReward(player_hand_value, is_ace_card, dealer_hand_value, is_blackjack, num_cards):
if(dealer_hand_value > 21):
if(is_blackjack == True):
return 1.5
else:
return 1
elif(dealer_hand_value == 21):
if(player_hand_value == 21):
if(is_blackjack == True):
if(is_ace_card == True and num_cards == 2):
return 0
else:
return 1.5
elif(is_blackjack == False):
if(is_ace_card == True and num_cards == 2):
return -1
else:
return 0
else:
return -1
elif(dealer_hand_value < 21):
if(player_hand_value == 21):
if(is_blackjack == True):
return 1.5
else:
return 1
elif(player_hand_value > dealer_hand_value):
return 1
elif(player_hand_value == dealer_hand_value):
return 0
elif(player_hand_value < dealer_hand_value):
return -1
if __name__ == "__main__":
for i in range(2,22):
print("\t")
for j in range(1,11):
print(str(i)+" "+str(j)+" "+str(rewardPlayer(i,j, 0.37, False)))
print("\t")
for j in range(1,11):
print(str(21)+" "+str(j)+" "+str(rewardPlayer(21,j, 0.37, True)))