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blackjack.py
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blackjack.py
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# This is the "black jack" example for justpy
# see https://github.com/justpy-org/justpy/blob/master/examples/blackjack.py
# Simplified blackjack game using https://deckofcardsapi.com/ API
# Not all rules are implemented
import justpy as jp
import asyncio
card_size = 0.5
card_width = int(226 * card_size)
card_height = int(card_width * 314 / 226)
button_classes = """
inline-flex items-center px-6 py-6 border border-gray-700 text-2xl leading-6 font-bold rounded-md text-gray-700
bg-white hover:text-gray-500 focus:outline-none focus:border-blue-300 focus:shadow-outline-blue active:text-gray-800
active:bg-gray-50 transition ease-in-out duration-150
"""
div_classes = "items-center px-6 py-6 border border-gray-700 text-3xl leading-6 font-bold rounded-md text-gray-700; bg-white "
class Card(jp.Img):
"""
Card component: an extended image with predefined width and height and a transition
"""
def __init__(self, **kwargs):
"""
constructor
"""
super().__init__(**kwargs)
self.width = card_width
self.height = card_height
self.set_class("ml-2")
self.transition = {
"load": "transition origin-left ease-out duration-1000",
"load_start": "transform scale-x-0",
"load_end": "transform scale-x-100",
"enter": "transition origin-left ease-out duration-1000",
"enter_start": "transform scale-x-0",
"enter_end": "transform scale-x-100",
}
async def create_deck():
"""
get a new deck
"""
deck = await jp.get("https://deckofcardsapi.com/api/deck/new/shuffle/?deck_count=1")
return deck["deck_id"]
async def deal(deck_id, count=1):
"""
deal
"""
try:
cards = await jp.get(
f"https://deckofcardsapi.com/api/deck/{deck_id}/draw/?count={count}"
)
except:
print("error in deal")
return cards
def hand_value(hand):
"""
calculate the hand value
"""
value = 0
aces = 0
for card in hand:
if card.value == "ACE":
aces += 1
value += 1
else:
try:
value += int(card.value)
except:
value += 10
if aces and value < 12:
value += 10
return value
async def hit(self, msg):
"""
react on hit button
"""
wp = msg.page
card_dict = jp.Dict(await deal(wp.deck_id))
card = card_dict.cards[0]
wp.player_hand.append(card)
wp.player_div.add(Card(src=card.image))
player_hand_value = hand_value(wp.player_hand)
if player_hand_value < 22:
wp.hand_value_div.text = f"Hand value: {player_hand_value}"
else:
wp.hand_value_div.text = f"YOU HAVE BUSTED, Hand value: {player_hand_value}"
dealer_hand_value = hand_value(wp.dealer_hand)
result_div = jp.Div(classes=div_classes, a=wp.outer_div)
result_div.text = f"YOU LOST, Your hand: {player_hand_value}, Dealer's hand: {dealer_hand_value}"
for btn in [wp.stand_btn, wp.hit_btn]:
btn.disabled = True
btn.set_classes("cursor-not-allowed bg-gray-200 opacity-50")
wp.play_again_btn.remove_class("hidden")
async def stand(self, msg):
"""
react on stand button
"""
wp = msg.page
# Show dealer card
wp.card_back.set_class("hidden")
wp.down_card.remove_class("hidden")
for btn in [wp.stand_btn, wp.hit_btn]:
btn.disabled = True
btn.set_classes("cursor-not-allowed bg-gray-200 opacity-50")
await wp.update()
await asyncio.sleep(1.1)
while True:
dealer_hand_value = hand_value(wp.dealer_hand)
if dealer_hand_value > 16:
break
card_dict = jp.Dict(await deal(wp.deck_id))
card = card_dict.cards[0]
wp.dealer_hand.append(card)
wp.dealer_div.add(Card(src=card.image))
await wp.update()
await asyncio.sleep(1.1)
player_hand_value = hand_value(wp.player_hand)
result_div = jp.Div(classes=div_classes, a=wp.outer_div)
if (dealer_hand_value > 21) or (dealer_hand_value < player_hand_value):
result_div.text = f"YOU WON, Your hand: {player_hand_value}, Dealer's hand: {dealer_hand_value}"
elif dealer_hand_value > player_hand_value:
result_div.text = f"YOU LOST, Your hand: {player_hand_value}, Dealer's hand: {dealer_hand_value}"
else:
result_div.text = f"IT IS A DRAW, Your hand: {player_hand_value}, Dealer's hand: {dealer_hand_value}"
wp.play_again_btn.remove_class("hidden")
async def play_again(self, msg):
"""
react on play again button
"""
wp = msg.page
await wp.reload()
async def blackjack():
"""
the async web page to serve
"""
wp = jp.WebPage()
wp.outer_div = jp.Div(
classes="container mx-auto px-4 sm:px-6 lg:px-8 space-y-5", a=wp
)
wp.deck_id = await create_deck()
# Deal initial four cards
cards = jp.Dict(await deal(wp.deck_id, 4))
wp.player_hand = [cards.cards[0], cards.cards[2]]
wp.dealer_hand = [cards.cards[1], cards.cards[3]]
jp.Div(
text="Blackjack Demo",
a=wp.outer_div,
classes="m-2 p-4 text-3xl font-bold leading-7 text-gray-900 sm:leading-9 sm:truncate",
)
wp.dealer_div = jp.Div(classes="flex flex-wrap m-2", a=wp.outer_div)
# Image of back of card
wp.card_back = Card(
src="https://raw.githubusercontent.com/elimintz/elimintz.github.io/master/card_back.png",
a=wp.dealer_div,
)
wp.down_card = Card(src=wp.dealer_hand[0].image, a=wp.dealer_div, classes="hidden")
Card(src=wp.dealer_hand[1].image, a=wp.dealer_div, style="transition-delay: 1000ms")
wp.player_div = jp.Div(classes="flex flex-wrap m-2", a=wp.outer_div)
for card in wp.player_hand:
Card(src=card.image, a=wp.player_div, style="transition-delay: 2000ms")
button_div = jp.Div(classes="flex m-2 space-x-6", a=wp.outer_div)
wp.stand_btn = jp.Button(
text="Stand", a=button_div, classes=button_classes, click=stand
)
wp.hit_btn = jp.Button(text="Hit", a=button_div, classes=button_classes, click=hit)
wp.play_again_btn = jp.Button(
text="Play Again", a=button_div, classes=button_classes, click=play_again
)
wp.play_again_btn.set_class("hidden")
wp.hand_value_div = jp.Div(
text=f"Hand value: {hand_value(wp.player_hand)}",
a=wp.outer_div,
classes="text-2xl",
)
return wp
from examples.basedemo import Demo
Demo("blackjack demo", blackjack)