在过去的几天里，我一直在尝试将pdf的扁平化过程自动化，我发现这个函数是最有效的。唯一的问题是没有读取a.kill（）命令，导致浏览器在函数完成后保持打开状态。保存过程完成后，如何关闭浏览器窗口？

import time
import subprocess
import keyboard
def chrome():
    test = "test"
    name = "file:///C://Users//akcgo//Documents//CARB//ARBER//PDFS//Company A.pdf"
    a = subprocess.Popen("C://Program Files (x86)//Google//Chrome//Application//chrome.exe")
    time.sleep(1)
    keyboard.write(name)
    time.sleep(1)
    keyboard.press_and_release('enter')
    time.sleep(1)
    keyboard.press_and_release(['ctrl', 'p'])
    time.sleep(1)
    keyboard.press_and_release('enter')
    time.sleep(1)
    keyboard.write(test)
    time.sleep(.5)
    keyboard.press_and_release('enter')
    time.sleep(2)
    a.kill()
    # keyboard.press_and_release(['ctrl', 'w']) doesn't work either