code: def get(self, filter_lambda=None, map_lambda=None):
          
          if filter_lambda is None:
              filter_lambda = lambda x: True
          if map_lambda is None:
              map_lambda = lambda x: x
          return list(map(map_lambda, filter(filter_lambda, self.tsv)))
docs: Select elements of the TSV, using python filter and map.
  
          Parameters
          ----------
          filter_lambda : function
              function to filter the tsv rows (the function needs to return True/False)
          map_lambda : function
              function to select the tsv columns
  
          Returns
          -------
          list
              list (not a generator, because that's the most common case)
  
          Examples
          --------
          To select all the channels in one list, called "good_labels"::
  
              >>> file_Tsv.get(lambda x: x['name'] in good_labels)
  
          To select all the names of the channels:
  
              >>> file_Tsv.get(map_filter=lambda x: x['name'])