Quick and dirty picamera script for skycam

skycam.py

from picamera import PiCamera
from time import sleep
from fractions import Fraction
from datetime import datetime
from os import makedirs
import argparse

parser = argparse.ArgumentParser()
parser.add_argument("--iso", type=int, default=800, help="ISO to use")
parser.add_argument("--shutter", type=int, default=6000000, help="shutter speed in microseconds")
parser.add_argument("--single", action='store_true', help="Capture a single image only, instead of a timelapse")
parser.add_argument("--timelapse", type=int, default=60, help="Timelapse between captures")
args = parser.parse_args()

camera = PiCamera(
        resolution=(1640,1232),
        framerate=Fraction(1,6),
        sensor_mode=4) # to enable binning
camera.shutter_speed = args.shutter
camera.iso = args.iso

sleep(2)
camera.exposure_mode = 'off'

skycam_homedir = "/home/james/allsky/skycam1/"
current_date = datetime.now().strftime('%Y-%m-%d_%H-%M-%S')
current_day  = datetime.now().strftime('%Y-%m-%d')
makedirs("{}/{}".format(skycam_homedir, current_day), exist_ok=True)

if(args.single):
    print("Operating in single capture mode")
    camera.capture("{}/{}/skycam1_{}.jpg".format(skycam_homedir, current_day, current_date))
else:
    print("Operating in timelapse mode, {} seconds between captures".format(args.timelapse))
    for filename in camera.capture_continuous("{}/{}/skycam1_{}.jpg".format(skycam_homedir, current_day, current_date)):
        print('Captured %s' % filename)
        sleep(args.timelapse)