code: def use_trump_data(self, symbols):
          
          dfs = {sym.units : sym.df[sym.name] for sym in symbols}
                 
          self.build_conversion_table(dfs)
docs: Use trump data to build conversion table
          
          symbols : 
              list of symbols:
                  will attempt to use units to build the conversion table,
                  strings represent symbol names.