old_contents: from selenium import webdriver
  from selinium.webdriver.common.keys import Keys
  
  class CheckMeIn(object): 
      
  
      def __init__(self, firstName, lastName, confNum):
          self.firstName = firstName
          self.lastName = lastName
          self.confNum = confNum
  
  
new_contents: from selenium import webdriver
  from selinium.webdriver.common.keys import Keys
  
  class CheckMeIn(object): 
      
      def __init__(self, firstName, lastName, confNum):
          self.firstName = firstName
          self.lastName = lastName
          self.confNum = confNum
  
      def checkIn():
          driver = webdriver.PhantomJS(executable_path='/usr/local/bin/phantomjs', service_log_path='/dev/null')
          driver.get("https://www.southwest.com/flight/retrieveCheckinDoc.html")
          
          firstNameElem = driver.find_element_by_id("firstName")
          lastNameElem = driver.find_element_by_id("lastName")
          confNumElem = driver.find_element_by_id("confirmationNumber")
          buttonElem = driver.find_element_by_id("submitButton")
          
          firstNameElem.send_keys(self.firstName)
          lastNameElem.send_keys(self.lastName)
          confNumElem.send_keys(self.confNum)
          buttonElem.click()
          
          driver.close()
  
subject: add checkIn() function