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# Day 7: Poker ID

Matt Ryan ・2 min read

Identify a hand in poker.

``````#!/usr/bin/python3

def determine_hand(hand):
card_value = dict(zip('2 3 4 5 6 7 8 9 T J Q K A'.split(), range(14)))

cards = []
suits = []

for card in hand.split():
c, s = list(card)
cards.append(c)
suits.append(s)

max_suit = max([suits.count(a) for a in suits])
same_cards = sorted([cards.count(a) for a in set(cards)])
card_nums = sorted([card_value[a] for a in cards])

def is_straight(cv):
diff = cv[-1] - cv[0]
if diff == 4:
return True
elif diff == 12:
if cv[-2] - cv[0] == 3:
return True
return False

# We have our flushes in here. Any less suits and we don't care.
if max_suit == 5:
if is_straight(card_nums):
if card_nums[0] == 8: # ROYAL FLUSH!!!
return "Royal Flush"
return "Straight Flush"
return "Flush"

# Checking in on our same cards
# With a length of two we either have two pair or a full house
elif len(same_cards) == 2:
if max(same_cards) == 4: # Four of a Kind
return "Four of a Kind"
elif max(same_cards) == 3: # Full House
return "Full House"
elif len(same_cards) == 3:
if max(same_cards) == 3: # Three of a kind
return "Three of a Kind"
else: # Two pair
return "Two Pair"
elif len(same_cards) == 4:
return "One Pair"
else: # Garbage hand most likely. But maybe a straight!
if is_straight(card_nums):
return "Straight"
return "High Card"

if __name__ == "__main__":
hands = ["TS JS QS KS AS", # Royal Flush
"AC 2C 3C 4C 5C", # Straight Flush
"AC AS 3C AD AH", # Four of a Kind
"TC 2C 2H TS TH", # Full House
"AH 5H TH 7H 4H", # Flush
"3D 4C 5H 6C 7D", # Straight
"3D 3C 3S 5H AD", # Three of a Kind
"3D 3C 5H 5S 7D", # Two Pair
"3D 3C 5H 8S 7D", # One Pair
"AC 3C 4H 7S 2D"] # High Card Garbage

for hand in hands:
print ("With a hand of {}, Bob has a {}!".format(hand, determine_hand(hand)))
``````