code: def _update_dirs_on_base(self):
          '''Fill up the names of dirs based on the contents of 'base'.'''
          if self._dirs['base'] != None:
              for d in self._predefined_dir_names:
                  dstr = d
                  #if d == "s2":
                  #    dstr = '.'+d
                  self._dirs[d] = os.path.join(self._dirs['base'], dstrf _update_dirs_on_base(self):
          '''Fill up the names of dirs based on the contents of 'base'.'''
          if self._dirs['base'] != None:
              for d in self._predefined_dir_names:
                  dstr = d
                  #if d == "s2":
                  #    dstr = '.'+d
                  self._dirs[d] = os.path.join(self._dirs['base'], dstr)
docs: Fill up the names of dirs based on the contents of 'base'.