Get all the image files from a dir path, including subdirs.

get_image_files.py

import os
import glob
import functools, operator


# extract image paths inside the image_dir_path including may include subdirectories using glob
accepted_exts = [".jpg", ".jpeg", ".png"]
image_files =  [glob.glob(os.path.join(image_dir_path,  "*"+ex)) for ex in accepted_exts]
if include_subdirs:
    image_files.extend([glob.glob(os.path.join(image_dir_path + "/**/",  "*"+ex)) for ex in accepted_exts])
image_files = functools.reduce(operator.iconcat, image_files, [])