Only the crop part

face_crop.py

from PIL import Image

def crop_faces(image_path,image_name,cropped_images_lib):
    with open(image_path, 'rb') as image:
        faces = detect_face(image, 8)
      
    im = Image.open(image_path)
    
    for idx,face in enumerate(faces):
      vects = face.fd_bounding_poly.vertices
      im2 = im.crop([vects[0].x, vects[0].y, vects[2].x - 1, vects[2].y - 1]) 
      cropped_image_path = cropped_images_lib + 'face' + str(idx+1) + '_' + image_name
      im2.save(cropped_image_path, 'JPEG')