<form id="__AjaxAntiForgeryForm" action="#" method="post">
   <input name="__RequestVerificationToken" type="hidden" value="LOUesP09TLS3suKJk4dF5hIxeo-LmDWLxX8xqwIHYnj-JqR29qDcGA_mtHXvyZIej83qG3FfBBs2nuzk1EY6onTuszY1">
</form>

page = urllib2.urlopen(LOGIN_URL)
# parse the html using beautiful soup and store in variable `soup`
soup = BeautifulSoup(page, "html.parser")

form = soup.find("form", {"id": "__AjaxAntiForgeryForm"})

<form action="#" id="__AjaxAntiForgeryForm" method="post"><input name="__RequestVerificationToken" type="hidden" value="zd7XHXyVs7EgqObLzIfm9k4bw1cWfcddhfDZ9Mp8TibBaAJUz-yAp1ZBuKS1iJtEAvmI1WG_EYnbmXBnWzuKWJxfl8U1"/></form>

form = soup.find("form", {"id": "__AjaxAntiForgeryForm"})['value']