Scrape broadcaster_status from mixlr.com with python (lxml and selenium)

scrape.py

from lxml import html
from selenium import webdriver

# scrape from mixlr page after js done (element won't exist otherwise)
driver = webdriver.PhantomJS(executable_path='<replace path>/phantomjs.exe') # another webdriver works fine
driver.get('http://mixlr.com/<replace username>')
tree = html.fromstring(driver.page_source)
air_status = tree.xpath('//*[@id="broadcaster_status"]/span[2]//text()')
driver.quit()