import pymysql
import numpy as np
import pandas as pd
from sqlalchemy import create_engine
engine=create_engine(‘mysql+pymysql://root:123456@localhost:3306/demo‘)
tables = pd.read_sql_query(‘show tables;‘, engine)
tables=tables.rename(columns={‘Tables_in_datacenter‘:‘tbs‘})

def datas(sql):
    return pd.read_sql_query(sql, engine)

def excute_sql(sql):
    conn = pymysql.connect(host="localhost",user="root",password="123456",database="datacenter",charset="utf8")
    cst = conn.cursor()
    cst.execute(sql)

      conn.close()