Python Beautiful Soup cannot find table

I have a web scraping code that cannot find a table. My code looks like:

site = 'http://etfdb.com/compare/market-cap/'
hdr = {'User-Agent': 'Mozilla/5.0'}
req = Request(site, headers=hdr)
page = urlopen(req)
soup = BeautifulSoup(page)
table = soup.find('table', {"class":"table mm-mobile-table table-striped 
table-bordered"})

The tables HTML looks like:

<table class="table mm-mobile-table table-striped table-bordered" data-
icons-prefix="fa" data-icons="{&quot;columns&quot;:&quot;fa-th&quot;}" data-
striped="true" data-toggle="table">

but for some reason my code always returns table as none. I do not know why but any help would be appreciated. Thanks.