text: #!/usr/bin/env python
  #-*- coding: utf-8 -*-
  
  try:
    from bs4 import BeautifulSoup
  except ImportError:
    print("Please install.")
    print("pip install bs4.")
    exit(255)
   
  try:
    from selenium import webdriver
  except ImportError:
    print("Please install.")
    print("pip install selenium.")
    exit(255)
  
  from selenium.webdriver.support.ui import WebDriverWait
  from selenium.webdriver.support import expected_conditions as EC
  from selenium.webdriver.common.by import By
  from selenium.common.exceptions import TimeoutException
  
  import sys
  import argparse
  
  # Use in a cloud environment where the browser can not be output.
  """
  from pyvirtualdisplay import Display
  display = Display(visible=0, size=(800, 800))  
  display.start()
  """
  
  def main():
  
    parser = argparse.ArgumentParser()
    parser.add_argument(
      '--chromedriver',
      type=str,
      default='/usr/local/bin/chromedriver',
      help='Location of chromedriver.')
    parser.add_argument(
      '--site',
      type=str,
      default='https://example.kr',
      help='Your website address.')
    parser.add_argument(
      '--id',
      type=str,
      default='foo',
      help='Your site ID.')
    parser.add_argument(
      '--passwd',
      type=str,
      default='bar',
      help='Your site password.')
  
    FLAGS, unparsed = parser.parse_known_args()
  
    browser = webdriver.Chrome(FLAGS.chromedriver)
    browser.implicitly_wait(3)
  
    browser.get(FLAGS.site)
    delay = 10 # seconds
    try:
      # FIXME. 'mb_id' is a special element of the site.
      myElem = WebDriverWait(browser, delay).until(EC.presence_of_element_located((By.ID, 'mb_id')))
      print("Page is ready!")
    except TimeoutException:
      print("Loading took too much time!")
      exit(255)
  
    browser.find_element_by_name('mb_id').send_keys(FLAGS.id)
    browser.find_element_by_name('mb_password').send_keys(FLAGS.passwd)
    browser.find_element_by_xpath('//*[@id="miso_sidelogin"]/div/div[1]/button').click()
    browser.find_element_by_xpath('//*[@id="talk_submit"]').click()
    browser.quit()
    print("Browser parsing terminated.")
  
  if __name__ == '__main__':
    main()
  