Python pymysql使用

一、.windows上的安装方法：

在python3.6中，自带pip3，所以在python3中可以直接使用pip3去安装所需的模块：

pip3 install pymysql -i https://pypi.douban.com/simple

二、.linux下安装方法：

1.tar包下载及解压

下载tar包
wget https://pypi.python.org/packages/29/f8/919a28976bf0557b7819fd6935bfd839118aff913407ca58346e14fa6c86/PyMySQL-0.7.11.tar.gz#md5=167f28514f4c20cbc6b1ddf831ade772
解压并展开tar包
tar xf PyMySQL-0.7.11.tar.gz

2.安装

[root@localhost PyMySQL-0.7.11]# python36 setup.py install

本次测试创建的数据及表：

#创建数据库及表，然后插入数据
mysql> create database dbforpymysql;
mysql> create table userinfo(id int not null auto_increment primary key,username varchar(10),passwd varchar(10))engine=innodb default charset=utf8;
mysql> insert into userinfo(username,passwd) values('frank','123'),('rose','321'),('jeff',666);

#查看表内容
mysql> select * from userinfo;
+----+----------+--------+
| id | username | passwd |
+----+----------+--------+
|  1 | frank    | 123    |
|  2 | rose     | 321    |
|  3 | jeff     | 666    |
+----+----------+--------+
3 rows in set (0.00 sec)

import pymysql

#连接数据库
db = pymysql.connect("localhost","root","LBLB1212@@","dbforpymysql")

#使用cursor()方法创建一个游标对象
cursor = db.cursor()

#使用execute()方法执行SQL语句
cursor.execute("SELECT * FROM userinfo")

#使用fetall()获取全部数据
data = cursor.fetchall()

#打印获取到的数据
print(data)

#关闭游标和数据库的连接
cursor.close()
db.close()

#运行结果
((1, 'frank', '123'), (2, 'rose', '321'), (3, 'jeff', '666'))

 

 

import pymysql
config={
"host":"127.0.0.1",
"user":"root",
"password":"LBLB1212@@",
"database":"dbforpymysql"
}
db = pymysql.connect(**config)
cursor = db.cursor()
sql = "INSERT INTO userinfo(username,passwd) VALUES('jack','123')"
cursor.execute(sql)
db.commit() #提交数据
cursor.close()
db.close()
或者在execute提供插入的数据
import pymysql
config={
"host":"127.0.0.1",
"user":"root",
"password":"LBLB1212@@",
"database":"dbforpymysql"
}
db = pymysql.connect(**config)
cursor = db.cursor()
sql = "INSERT INTO userinfo(username,passwd) VALUES(%s,%s)"
cursor.execute(sql,("bob","123"))
db.commit() #提交数据
cursor.close()
db.close()

 

import pymysql
config={
"host":"127.0.0.1",
"user":"root",
"password":"LBLB1212@@",
"database":"dbforpymysql"
}
db = pymysql.connect(**config)
cursor = db.cursor()
sql = "INSERT INTO userinfo(username,passwd) VALUES(%s,%s)"
cursor.executemany(sql,[("tom","123"),("alex",'321')])
db.commit() #提交数据
cursor.close()
db.close()