code: def next_id(current_id, worker_num):
      if current_id == worker_num:
          return 1
      else:
          return current_id + 1
  
file_path: face_recognition/examples/facerec_from_webcam_multiprocessing.py
imports: import face_recognition
  import cv2
  from multiprocessing import Process, Manager, cpu_count, set_start_method
  import time
  import numpy
  import threading
  import platform
label_desc: Use image node_id 1 for calling a global function with example usage: next_id(current_id, worker_num) and returns: int, unknown