How to interact with a print box using python

I have been using selenium to automatic printing documents and I am stuck on the print screen. As far as I know, selenium does not interact with the print screen so I am looking for an alternate situation that I can use with selenium. My code so far is down below, and all I need is code that will let me choose a new printer and then print. Also I want to change that printer to Save as PDF and then save the pdf to a file, so if that gives me a shortcut that would help a lot.

from selenium import webdriver
from selenium import *
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
from selenium.webdriver.common.by import By
from selenium.webdriver.common.keys import Keys

driver = webdriver.Remote(
         command_executor='http://127.0.0.1:4444/wd/hub',
         desired_capabilities=DesiredCapabilities.CHROME) #This is because I am using remote web driver for my Mac, but it is the same as regular web driver

driver.execute("window.print()")

#Need code here