求助代码报错'NoneType' object is not subscriptable

神秘的帅哥

1. from PIL import Image, ImageDraw, ImageFont
   
2. import cv2
   
3. import os
   
4. 
   
5. def draw(pic):
   
6.     img = cv2.imread('pic/' + pic)
   
7.     img = img[:, :, (2, 1, 0)]
   
8. 
   
9.     blank = Image.new("RGB", [len(img[0]), len(img)], "white")
   
10.     drawObj = ImageDraw.Draw(blank)
    
11. 
    
12.     n = 10
    
13. 
    
14.     font = ImageFont.truetype('C:/Windows/Fonts/Microsoft YaHei UI/msyhbd.ttc', size = n - 1)
    
15. 
    
16.     for i in range(0, len(img), n):
    
17.         for j in range(0, len(img[i]), n):
    
18.             text = '武汉加油'
    
19.             drawObj.ink = img[i][j][0] + img[i][j][1] * 256 + img[i][j][2] * 256 * 256
    
20.             drawObj.text([j, i], text[int(j / n) % len(text)], font=font)
    
21.             print('完成处理——', i, j)
    
22. 
    
23.     blank.save('new/new_' + pic, 'jpeg')
    
24. 
    
25. 
    
26. filelist = os.listdir('pic')
    
27. for file in filelist:
    
28.     draw(file)

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运行报错

1. Traceback (most recent call last):
   
2.   File "D:/PyCharm/PycharmProjects/樱花/cv_3.py", line 28, in <module>
   
3.     draw(file)
   
4.   File "D:/PyCharm/PycharmProjects/樱花/cv_3.py", line 7, in draw
   
5.     img = img[:, :, (2, 1, 0)]
   
6. TypeError: 'NoneType' object is not subscriptable
   
7. 
   
8. 进程已结束，退出代码 1

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求助大神应该怎么修改

wp231957

测试一下img的类型，看看是否能切片