code: def _CreateStyle(self, doc, style_id, style_dict):
      
  
      def CreateElements(current_element, current_dict):
        for (key, value) in current_dict.iteritems():
          element = ET.SubElement(current_element, key)
          if isinstance(value,dict):
            CreateElements(element, value)
          else:
            element.text = value
  
      style = ET.SubElement(doc, 'Style', {'id': style_id})
      CreateElements(style, style_dict)
      return style
docs: Helper method to create a <Style/> element in a KML document.
  
      Args:
        doc: the parent KML document.
        style_id: the style id to include for the <Style/> element.
        style_dict: a dict of sub-elements and values to add to the <Style/>.
  
      Returns:
        The newly created <Style/> element.
  
      Each key of the style_dict argument is used to create a sub-element of the
      parent <Style/> element.  If the value associated with that key is a string,
      then it will be used to set the text value of the sub-element.  If the value
      is another dict, it will be used to recursively construct a sub-sub-element
      with the same semantics.