PythonでDirectInputでキー入力を行いたい。

PythonでDirectInputのキーボード入力が行いたいです。
https://pythonprogramming.net/direct-input-game-python-plays-gta-v/
↑のサイトを参考に実行してみたのですが、エラーが出て、解決法が分かりません。

Python
1#directKeys.py
2import ctypes
3import time
4
5SendInput = ctypes.windll.user32.SendInput
6
7
8W = 0x11
9A = 0x1E
10S = 0x1F
11D = 0x20
12
13# C struct redefinitions 
14PUL = ctypes.POINTER(ctypes.c_ulong)
15class KeyBdInput(ctypes.Structure):
16    _fields_ = [("wVk", ctypes.c_ushort),
17                ("wScan", ctypes.c_ushort),
18                ("dwFlags", ctypes.c_ulong),
19                ("time", ctypes.c_ulong),
20                ("dwExtraInfo", PUL)]
21
22class HardwareInput(ctypes.Structure):
23    _fields_ = [("uMsg", ctypes.c_ulong),
24                ("wParamL", ctypes.c_short),
25                ("wParamH", ctypes.c_ushort)]
26
27class MouseInput(ctypes.Structure):
28    _fields_ = [("dx", ctypes.c_long),
29                ("dy", ctypes.c_long),
30                ("mouseData", ctypes.c_ulong),
31                ("dwFlags", ctypes.c_ulong),
32                ("time",ctypes.c_ulong),
33                ("dwExtraInfo", PUL)]
34
35class Input_I(ctypes.Union):
36    _fields_ = [("ki", KeyBdInput),
37                 ("mi", MouseInput),
38                 ("hi", HardwareInput)]
39
40class Input(ctypes.Structure):
41    _fields_ = [("type", ctypes.c_ulong),
42                ("ii", Input_I)]
43
44# Actuals Functions
45
46def PressKey(hexKeyCode):
47    extra = ctypes.c_ulong(0)
48    ii_ = Input_I()
49    ii_.ki = KeyBdInput( 0, hexKeyCode, 0x0008, 0, ctypes.pointer(extra) )
50    x = Input( ctypes.c_ulong(1), ii_ )
51    ctypes.windll.user32.SendInput(1, ctypes.pointer(x), ctypes.sizeof(x))
52
53def ReleaseKey(hexKeyCode):
54    extra = ctypes.c_ulong(0)
55    ii_ = Input_I()
56    ii_.ki = KeyBdInput( 0, hexKeyCode, 0x0008 | 0x0002, 0, ctypes.pointer(extra) )
57    x = Input( ctypes.c_ulong(1), ii_ )
58    ctypes.windll.user32.SendInput(1, ctypes.pointer(x), ctypes.sizeof(x))
59
60if __name__ == '__main__':
61    PressKey(0x11)
62    time.sleep(1)
63    ReleaseKey(0x11)
64    time.sleep(1)

を作り、実際に入力を行うtest.pyを同じディレクトリに作りました。

python
1# -*- coding: utf-8 -*-
2#test.py
3import numpy as np
4from PIL import ImageGrab
5import cv2
6import time
7import pyautogui
8from directkeys import PressKey, W, A, S, D
9
10def process_img(image):
11    original_image = image
12    # convert to gray
13    processed_img = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
14    # edge detection
15    processed_img =  cv2.Canny(processed_img, threshold1 = 200, threshold2=300)
16    return processed_img
17
18def main():
19    
20    for i in list(range(4))[::-1]:
21        print(i+1)
22        time.sleep(1)
23
24    last_time = time.time()
25    while True:
26        PressKey(W)
27        screen =  np.array(ImageGrab.grab(bbox=(0,40,800,640)))
28        #print('Frame took {} seconds'.format(time.time()-last_time))
29        last_time = time.time()
30        new_screen = process_img(screen)
31        cv2.imshow('window', new_screen)
32        #cv2.imshow('window',cv2.cvtColor(screen, cv2.COLOR_BGR2RGB))
33        if cv2.waitKey(25) & 0xFF == ord('q'):
34            cv2.destroyAllWindows()
35            break
36        
37main()
38