
import py 
class ns(py.xml.Namespace): 
    pass 

doc = ns.books(
    ns.book(
        ns.author("May Day"), 
        ns.title("python for java programmers"),), 
    ns.book( 
        ns.author("why", class_="somecssclass"), 
        ns.title("Java for Python programmers"),),
    publisher="N.N", 
    )
print doc.unicode(indent=2).encode('utf8')


