test.py

from game_cart import Car
import gym
import numpy as np
import random
from keras.models import Sequential
from keras.layers import Dense, Dropout
from keras.optimizers import Adam, SGD, Adadelta, RMSprop
from keras.layers.convolutional import Conv2D, MaxPooling2D
from keras.layers import Activation, Flatten
import cv2
from keras.layers.normalization import BatchNormalization
import pygame
from random import randint
clock = pygame.time.Clock()
from collections import deque
import os

path = os.getcwd()


class DQNAgent:
    def __init__(self, state_size, action_size):        
        self.state_size = state_size
        self.action_size = action_size
        self.model = self.load_trained_model()        

        
    def build_model(self):
        model = Sequential()
        model.add(Conv2D(32, kernel_size=(3,3), activation="relu",  input_shape=self.state_size))
        model.add(MaxPooling2D(pool_size=(2, 2)))
        model.add(Conv2D(32, kernel_size=(3,3), activation="relu",  input_shape=self.state_size))
        model.add(MaxPooling2D(pool_size=(2, 2)))   
        model.add(Flatten())
        model.add(Dense(32, input_dim=self.state_size, activation='relu'))      
        model.add(Dense(32, input_dim=self.state_size, activation='relu'))         
        model.add(Dense(self.action_size, activation='linear'))
        return model
        
        
    def act(self, state):    
        result = self.model.predict(state)[0].tolist()
        result = result.index(max(result))        
        return result        
        
        
    def load_trained_model(self):        
       model = self.build_model()
       model.load_weights(path+"/success.model")       
       return model
       
       
if __name__ == "__main__":
    env = Car()
    agent = DQNAgent(env.state_size,env.act_size)
    trials = 200

    for step in range(trials):  
        state, _, _ = env.run()

        for trial in range(512):        
            action = agent.act(state)            
            next_state, reward, done  = env.run(action)    
            state = next_state           
            pressed = pygame.key.get_pressed()    
                    
            if pressed[pygame.K_q]: pygame.quit()            
            
            clock.tick(60)