code: def set_geo_area(self, area):
          '''Sets the geo area for the map.
  
          * africa
          * asia
          * europe
          * middle_east
          * south_america
          * usa
          * world
          '''
          
          if area in self.__areas:
              self.geo_area = area
          else:
              raise UnknownChartType('Unknown chart type for maps: %s' %areaf set_geo_area(self, area):
          '''Sets the geo area for the map.
  
          * africa
          * asia
          * europe
          * middle_east
          * south_america
          * usa
          * world
          '''
          
          if area in self.__areas:
              self.geo_area = area
          else:
              raise UnknownChartType('Unknown chart type for maps: %s' %area)
docs: Sets the geo area for the map.
  
          * africa
          * asia
          * europe
          * middle_east
          * south_america
          * usa
          * world