code: def __get_method_abbrev(self):
          
          abbrevs = {
              'furthest': 'fn',
              'nearest': 'nn',
              'average': 'an',
          }
          if self.Parameters['method'].isOn():
              method = self.Parameters['method'].Value
          else:
              method = self.Parameters['method'].Default
          return abbrevs[method]
docs: Abbreviated form of clustering method parameter.
  
          Used to guess output filenames for MOTHUR.