利用pymysql库连接python

首先安装pymysql库：

pip install -U pymysql -i https://pypi.douban.com/simple

安装其余模块如下：

pip3 install -U 模块名 -i https://pypi.douban.com/simple

获取数据方法

import pymysql 
import pandas as pd 

def get_mysql_data(DB, sql):
    conn = pymysql.connect(host=DB['host'], port=DB['port'], user=DB['user'], password=DB['password'], database=DB['dbname'])
    # 创建游标
    cursor = conn.cursor()
    # 执行sql语句
    cursor.execute(sql)
    # 调出数据
    data = cursor.fetchall()
    # cols为字段信息 
    cols = cursor.description
    # 将数据转换为DataFrame
    col = []
    for i in cols:
        col.append(i[0])
    # data转成list形式 
    data = list(map(list, data))
    data = pd.DataFrame(data,columns=col)
    # 关闭游标以及连接
    cursor.close()
    conn.close()
    return data

DB = {
      'host':"127.0.0.1",'port':3306, 'user':'root','password':'mysql','dbname':'kkb_17'}
SQL = "select * from employee;"
res = get_mysql_data(DB, SQL)