text: #!/usr/bin/env python3
  import numpy as np
  import cv2
  
  cap = cv2.VideoCapture(0)
   
  while(True):
      ret, frame = cap.read()
      gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
   
      cv2.imshow('frame',gray)
      if cv2.waitKey(1) & 0xFF == ord('q'):
          break
  
  cap.release()
  cv2.destroyAllWindows()
  