python3 pandas 读取MySQL数据和插入的实例

python 代码如下：

# -*- coding:utf-8 -*-
import pandas as pd
import pymysql
import sys
from sqlalchemy import create_engine

def read_mysql_and_insert():

try:
 conn = pymysql.connect(host='localhost',user='user1',password='123456',db='test',charset='utf8')
except pymysql.err.OperationalError as e:
 print('Error is '+str(e))
 sys.exit()

try:
 engine = create_engine('mysql+pymysql://user1:123456@localhost:3306/test')
except sqlalchemy.exc.OperationalError as e:
 print('Error is '+str(e))
 sys.exit()
except sqlalchemy.exc.InternalError as e:
 print('Error is '+str(e))
 sys.exit()

try:
 sql = 'select * from sum_case'
 df = pd.read_sql(sql, con=conn)
except pymysql.err.ProgrammingError as e:
 print('Error is '+str(e))
 sys.exit()

print(df.head())
df.to_sql(name='sum_case_1',con=engine,if_exists='append',index=False)
conn.close()
print('ok')

if __name__ == '__main__':
df = read_mysql_and_insert()

另外需要注意的还有。

1） test数据库里有两个表，建表语句如下：

CREATE TABLE `sum_case` (
`type_id` tinyint(2) DEFAULT NULL,
`type_name` varchar(5) DEFAULT NULL,
KEY `b` (`type_name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `sum_case_1` (
`type_id` tinyint(2) DEFAULT NULL,
`type_name` varchar(5) DEFAULT NULL,
KEY `b` (`type_name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

插入初始数据

insert into sum_case (type_id,type_name) values (1,'a'),(2,'b'),(3,'c')

2）创建user1用户

grant select, update,insert on test.* to 'user1'@'localhost' identified by '123456'

来源：https://blog.csdn.net/uvyoaa/article/details/74421911