Python PhantomJS Screenshot

from os import system
import argparse

parser = argparse.ArgumentParser()
parser.add_argument("-url", help="URL to screenshot", type=str)
parser.add_argument("-save", help="Filename to save as", type=str)
args = parser.parse_args()

phantomJS_template = """var page = require('webpage').create();
page.settings.userAgent = 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/39.0.2171.71 Safari/537.36 Edge/12.0';
page.viewportSize = {
    width: 1920,
    height: 1080
};
page.zoomFactor = 1; //default value is 1
page.open('http://%s', function() {
  page.render('%s.png');
  phantom.exit();
});""" % (args.url, args.save)

PHANTOMJS = "./phantomjs-2.1.1-linux-x86_64/bin/phantomjs"
FILENAME = "screenshot.js"

pjsfp = open(FILENAME, "w")
pjsfp.write(phantomJS_template)
pjsfp.close()
system("%s %s" % (PHANTOMJS, FILENAME))