def close(self):
        if not self.conn:
            return ValueError
        self.conn.close()
Start the Bokeh Server's IO loop and background tasks.
dataset/ETHPy150Open perseas/Pyrseas/pyrseas/lib/dbutils.py/PostgresDb.close--crossover with--dataset/ETHPy150Open bokeh/bokeh/bokeh/server/server.py/Server.start