Takes a picture using the raspberry pi camera and saves the resulting image with datetime filename

camera.py

from picamera import PiCamera
import time
import os

camera = PiCamera()

camera.start_preview()
time.sleep(3)
currentTime = time.strftime("%Y-%m-%d-%T")

#print(currentTime)
if not os.path.exists('/home/pi/Desktop/camera/'):
    os.makedirs('/home/pi/Desktop/camera/')
path = '/home/pi/Desktop/camera/' + currentTime + '.jpg'
camera.capture(path)
camera.stop_preview()
os.system('xdg-open ' + path)
print(path