如何遍历Beautiful Soup元素的HTML属性？

如何遍历Beautiful Soup元素的HTML属性？

from BeautifulSoup import BeautifulSouppage = BeautifulSoup('<foo bar="asdf" blah="123">xyz</foo>')for attr, value in page.find('foo').attrs:    print attr, "=", value# Prints:# bar = asdf# blah = 123