docs: def Element(cls, s, *args):
          """given a string s and string *args, return an Element."""
          sargs = []
          for arg in args:
              if type(arg) == etree._Element:
                  sargs.append(etree.tounicode(arg))
              else:
                  sargs.append(arg)
          if type(s) == etree._Element:
              t = etree.tounicode(s)
          else:
              t = s
          if len(args) == 0:
              return XML.fromstring(t)
          else:
              return XML.fromstring(t % tuple(sargs))