code: def get_variables(run_name):
      
      conn, c = open_data_base_connection()
      try:
          # Get latest project
          c.execute("""SELECT variable_name FROM {}""".format(run_name))
          variable_names = np.array(c.fetchall()).squeeze(axis=1)
          variable_names = convert_list_to_dict(variable_names)
          return variable_names
      except sqlite3.OperationalError:
          logging.info("{} not found".format(run_name))
      finally:
          conn.close()
docs: Returns a dict of variables in the selected run table.
      :param run_name: str, required run table name
      :return: dict -> {<int_keys>: <variable_name>}