code: def make_dict(cls, table):
          
          ret_dict = {}
          for row in table:
              file_handle = cls.create_from_row(row)
          ret_dict[file_handle.key] = file_handle
          return ret_dict
docs: Build and return a dict of `FileHandle` from an `astropy.table.Table`
  
          The dictionary is keyed by FileHandle.key, which is a unique integer for each file