扣丁学堂简述python3 pandas如何读取MySQL数据和
今天扣丁学堂Python培训小编和大家探讨一下python3 pandas如何读取MySQL数据和插入的问题,文章中会有详细的代码列出供大家参考,对Python开发感兴趣的小伙伴就随小编一起来了解一下吧。
Python培训
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'
以上就是扣丁学堂Python在线学习小编给大家分享的python3 pandas 读取MySQL数据和插入的实例,希望对小伙伴们有所帮助,想要了解更多内容的小伙伴可以登录扣丁学堂官网咨询。想要学好Python开发小编给大家推荐口碑良好的扣丁学堂,扣丁学堂有专业老师制定的Python学习路线图辅助学员学习,此外还有与时俱进的Python课程体系和大量的Python视频教程供学员观看学习,想要学好Python开发技术的小伙伴快快行动吧。