python code capture image from webcam in raspbian

this is the python script i used to capture photo from webcam logitech c170 in raspberry pi

 

import time 

import datetime

from subprocess import call

now = datetime.datetime.now()

call(["fswebcam","-p","YUYV","-d","/dev/video0","-r","640x480","--no-banner","/home/pi/pictures/%s.jpg" % now])

time.sleep(1)