python采集锐捷华三交换机

import paramiko
import os
import time
import random
import datetime
import pandas as pd
import re
import numpy as np
from sqlalchemy import text, create_engine
import psycopg2
from psycopg2 import sql
from sqlalchemy.orm import sessionmaker
from sqlalchemy.dialects.postgresql import insert as pg_insert
from sqlalchemy import create_engine, MetaData, Table, inspect
import schedule