1. If image suffix is in the label's name, label's path will be error 2. Deprecated alias "np.int"

[shyhyawJou]

1. Deprecated alias "np.int"
   np.int is deprecated from numpy v1.20, I recommend to replace the "np.int" with "np.int64" because this is
   compatible with newer and older version.

2. If image suffix is in the label's name, label's path will be error
   Take a image name for example: "IMG_jpg_banana.jpg",
   your original code:

   x.replace(sa, sb, 1).replace(x.split('.')[-1], 'txt')
   

   will assume its label file name is "IMG_txt_banana.txt", because this line will replace all "jpg" in the image
   path with "txt", I recommend to use the function "with_suffix" in the "pathlib"