code: def get_ascii(self, show_internal=True, compact=False, attributes=None):
          
          (lines, mid) = self._asciiArt(show_internal=show_internal,
                                        compact=compact, 
                                        attributes=attributes)
          return '\n'+'\n'.join(lines)
docs: Returns a string containing an ascii drawing of the tree.
          
          Parameters:
          -----------
          show_internal: 
              include internal edge names.
          compact: 
              use exactly one line per tip.
          attributes: 
              A list of node attributes to shown in the ASCII representation.