code: def get_values_fix_params(self, exp, rep, tag, which='last', **kwargs):
           
          subexps = self.get_exps(exp)
          tagvalues = ['%s%s'%(k, convert_param_to_dirname(kwargs[k])) for k in kwargs]
          
          values = [self.get_value(se, rep, tag, which) for se in subexps if all(map(lambda tv: tv in se, tagvalues))]
          params = [self.get_params(se) for se in subexps if all(map(lambda tv: tv in se, tagvalues))]
          
          return values, params
docs: this function uses get_value(..) but returns all values where the
              subexperiments match the additional kwargs arguments. if alpha=1.0,
              beta=0.01 is given, then only those experiment values are returned,
              as a list.