code: def get(self,coordinate_system):
          
          if coordinate_system == 'DA-DIR' or coordinate_system == 'specimen':
              return self.pars
          elif coordinate_system == 'DA-DIR-GEO' or coordinate_system == 'geographic':
              return self.geopars
          elif coordinate_system == 'DA-DIR-TILT' or coordinate_system == 'tilt-corrected':
              return self.tiltpars
          else:
              print("-E- no such parameters to fetch for " + coordinate_system + " in fit: " + self.name)
              return None
docs: Return the pmagpy paramters dictionary associated with this fit and the given
          coordinate system
          @param: coordinate_system -> the coordinate system who's parameters to return