Chapter 08
Blackjack Playground
NotebookPython 34 cells
In [1]python · cell 1
python
import numpy as np
import sys
if "../" not in sys.path:
sys.path.append("../")
from lib.envs.blackjack import BlackjackEnvIn [2]python · cell 2
python
env = BlackjackEnv()In [3]python · cell 3
python
def print_observation(observation):
score, dealer_score, usable_ace = observation
print("Player Score: {} (Usable Ace: {}), Dealer Score: {}".format(
score, usable_ace, dealer_score))
def strategy(observation):
score, dealer_score, usable_ace = observation
# Stick (action 0) if the score is > 20, hit (action 1) otherwise
return 0 if score >= 20 else 1
for i_episode in range(20):
observation = env.reset()
for t in range(100):
print_observation(observation)
action = strategy(observation)
print("Taking action: {}".format( ["Stick", "Hit"][action]))
observation, reward, done, _ = env.step(action)
if done:
print_observation(observation)
print("Game end. Reward: {}\n".format(float(reward)))
breakOutput
Player Score: 19 (Usable Ace: False), Dealer Score: 5 Taking action: Hit Player Score: 27 (Usable Ace: False), Dealer Score: 5 Game end. Reward: -1.0 Player Score: 21 (Usable Ace: True), Dealer Score: 10 Taking action: Stick Player Score: 21 (Usable Ace: True), Dealer Score: 10 Game end. Reward: 0.0 Player Score: 21 (Usable Ace: True), Dealer Score: 10 Taking action: Stick Player Score: 21 (Usable Ace: True), Dealer Score: 10 Game end. Reward: 1.0 Player Score: 14 (Usable Ace: True), Dealer Score: 10 Taking action: Hit Player Score: 19 (Usable Ace: True), Dealer Score: 10 Taking action: Hit Player Score: 15 (Usable Ace: False), Dealer Score: 10 Taking action: Hit Player Score: 20 (Usable Ace: False), Dealer Score: 10 Taking action: Stick Player Score: 20 (Usable Ace: False), Dealer Score: 10 Game end. Reward: 1.0 Player Score: 20 (Usable Ace: False), Dealer Score: 10 Taking action: Stick Player Score: 20 (Usable Ace: False), Dealer Score: 10 Game end. Reward: 1.0 Player Score: 18 (Usable Ace: False), Dealer Score: 6 Taking action: Hit Player Score: 27 (Usable Ace: False), Dealer Score: 6 Game end. Reward: -1.0 Player Score: 16 (Usable Ace: False), Dealer Score: 3 Taking action: Hit Player Score: 18 (Usable Ace: False), Dealer Score: 3 Taking action: Hit Player Score: 23 (Usable Ace: False), Dealer Score: 3 Game end. Reward: -1.0 Player Score: 19 (Usable Ace: False), Dealer Score: 10 Taking action: Hit Player Score: 23 (Usable Ace: False), Dealer Score: 10 Game end. Reward: -1.0 Player Score: 19 (Usable Ace: False), Dealer Score: 4 Taking action: Hit Player Score: 21 (Usable Ace: False), Dealer Score: 4 Taking action: Stick Player Score: 21 (Usable Ace: False), Dealer Score: 4 Game end. Reward: 1.0 Player Score: 21 (Usable Ace: True), Dealer Score: 4 Taking action: Stick Player Score: 21 (Usable Ace: True), Dealer Score: 4 Game end. Reward: 1.0 Player Score: 16 (Usable Ace: True), Dealer Score: 10 Taking action: Hit Player Score: 16 (Usable Ace: False), Dealer Score: 10 Taking action: Hit Player Score: 26 (Usable Ace: False), Dealer Score: 10 Game end. Reward: -1.0 Player Score: 14 (Usable Ace: False), Dealer Score: 10 Taking action: Hit Player Score: 23 (Usable Ace: False), Dealer Score: 10 Game end. Reward: -1.0 Player Score: 12 (Usable Ace: False), Dealer Score: 10 Taking action: Hit Player Score: 15 (Usable Ace: False), Dealer Score: 10 Taking action: Hit Player Score: 16 (Usable Ace: False), Dealer Score: 10 Taking action: Hit Player Score: 26 (Usable Ace: False), Dealer Score: 10 Game end. Reward: -1.0 Player Score: 16 (Usable Ace: True), Dealer Score: 8 Taking action: Hit Player Score: 18 (Usable Ace: True), Dealer Score: 8 Taking action: Hit Player Score: 18 (Usable Ace: False), Dealer Score: 8 Taking action: Hit Player Score: 20 (Usable Ace: False), Dealer Score: 8 Taking action: Stick Player Score: 20 (Usable Ace: False), Dealer Score: 8 Game end. Reward: 1.0 Player Score: 20 (Usable Ace: False), Dealer Score: 10 Taking action: Stick Player Score: 20 (Usable Ace: False), Dealer Score: 10 Game end. Reward: -1.0 Player Score: 15 (Usable Ace: False), Dealer Score: 10 Taking action: Hit Player Score: 16 (Usable Ace: False), Dealer Score: 10 Taking action: Hit Player Score: 23 (Usable Ace: False), Dealer Score: 10 Game end. Reward: -1.0 Player Score: 12 (Usable Ace: False), Dealer Score: 4 Taking action: Hit Player Score: 16 (Usable Ace: False), Dealer Score: 4 Taking action: Hit Player Score: 24 (Usable Ace: False), Dealer Score: 4 Game end. Reward: -1.0 Player Score: 20 (Usable Ace: False), Dealer Score: 7 Taking action: Stick Player Score: 20 (Usable Ace: False), Dealer Score: 7 Game end. Reward: 1.0 Player Score: 15 (Usable Ace: False), Dealer Score: 7 Taking action: Hit Player Score: 21 (Usable Ace: False), Dealer Score: 7 Taking action: Stick Player Score: 21 (Usable Ace: False), Dealer Score: 7 Game end. Reward: 1.0 Player Score: 15 (Usable Ace: False), Dealer Score: 8 Taking action: Hit Player Score: 23 (Usable Ace: False), Dealer Score: 8 Game end. Reward: -1.0
In [ ]python · cell 4
python