code: def add_text(self, text):
          
          if not isinstance(text, basestring):
              text = unicode(text)
          self._add_text(self.impl_node, text)
docs: Add a text node to this element.
  
          Adding text with this method is subtly different from assigning a new
          text value with :meth:`text` accessor, because it "appends" to rather
          than replacing this element's set of text nodes.
  
          :param text: text content to add to this element.
          :param type: string or anything that can be coerced by :func:`unicode`.