from selenium.webdriver.common.by import By

from selenium.webdriver.support.ui import WebDriverWait

from selenium.webdriver.support import expected_conditions as EC

driver = webdriver.PhantomJS(executable_path='')

driver.get("http://pythonscraping.com/pages/javascript/ajaxDemo.html")

try:

element = WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.ID, "loadedButton")))

finally:

print(driver.find_element_by_id("content").text)

driver.close()