config.json

{
    "appName": "War Game",
    
    "windowSettings": {
        "WIDTH": 900,
        "HEIGHT": 500
    },

    "FPS": 60
}

gui_class.py

class WarGameUI:
    
    def __init__(self, config_file):
        
        # import the input data
        with open(config_file, "r") as f:
            self.CONFIG = json.load(f)

        # setup initial windows
        self.WIN = pygame.display.set_mode((self.CONFIG["windowSettings"]["WIDTH"],
                                            self.CONFIG["windowSettings"]["HEIGHT"]))
        pygame.display.set_caption(self.CONFIG["appName"])

player_class.py

class Player:
    
    def __init__(self, player_profile):
        
        with open(player_profile, "r") as f:
            profile = json.load(f)
        
        self.player_image = pygame.image.load(os.path.join('assets',
                                                           profile["player_picture"]))
        self.player_image = pygame.transform.scale(self.player_image,(profile["width"],
                                                                      profile["height"]))
        
        self.name = profile["playerName"]
        
        self.width = profile["width"]
        self.height = profile["height"]
        
        self.initialX = profile["initialX"] - self.width / 2
        self.initialY = profile["initialY"] - self.height / 2
        
        self.x = self.initialX
        self.y = self.initialY
        
        self.keyUp = profile["keyUp"]
        self.keyDown = profile["keyDown"]

playerLeft.json

{
    "player_picture": "bar.png",
    "playerName": "left",
    "initialX": 10,
    "initialY": 250,
    "width": 15,
    "height": 50,
    "keyUp": "a",
    "keyDown": "q",
    "fire": "s"
}