MySQL_pymysql模块

　　安装：pip install pymysql

　　基本操作

import pymysql
conn=pymysql.connect(host='localhost',user='root',password='',database='lary',charset='utf8')   #链接
cursor=conn.cursor() #执行完毕返回的结果集默认以元组显示  游标
#cursor=conn.cursor(cursor=pymysql.cursors.DictCursor)
sql='select * from userinfo where name=%s and password=%s '
cursor.execute(sql,params) #执行sql语句，返回sql查询成功的记录数目
#fetchone()/fetchmany()/fetchall()  #针对查询语句
#conn.commit()   #针对增、删、改语句
cursor.close()
conn.close()

　　pymysql操作数据库类

#!/usr/bin/env python
#coding:utf-8
 
import pymysql
import config
 
class MysqlHelper():
    def __init__(self):
        self.conn = config.conn_dict
 
    def get_one(self, sql, params):
        '''
        查询并获取一条记录
        :param sql:
        :param params:
        :return:
        '''
        conn = pymysql.connect(**self.conn)
        cur = conn.cursor(cursor=pymysql.cursors.DictCursor)
        retCount = cur.execute(sql, params)
        data = cur.fetchone()
        cur.close()
        conn.close()
        return data
 
    def get_many(self, sql, params):
        '''
        查询并获取所有记录
        :param sql:
        :param params:
        :return:
        '''
        conn = pymysql.connect(**self.conn)
        cur = conn.cursor(cursor=pymysql.cursors.DictCursor)
        retCount = cur.execute(sql, params)
        data = cur.fetchall()
        cur.close()
        conn.close()
        return data
 
    def insert_one(self, sql, params):
        '''
        插入一条数据
        :param sql:
        :param params:
        :return:
        '''
        conn = pymysql.connect(**self.conn)
        cur = conn.cursor()
        cur.execute(sql, params)
        conn.commit()
        cur.close()
        conn.close()
        return 'insert success'
 
    def insert_many(self,sql,params):
        '''
        插入多条数据
        :param sql:
        :param params:
        :return:
        '''
        conn = pymysql.connect(**self.conn)
        cur = conn.cursor()
        cur.executemany(sql, params)
        conn.commit()
        cur.close()
        conn.close()
        return 'insert success'
 
    def update_one(self,sql,params):
        '''
        修改一条数据
        :param sql:
        :param params:
        :return:
        '''
        conn = pymysql.connect(**self.conn)
        cur = conn.cursor(cursor=pymysql.cursors.DictCursor)
        cur.execute(sql, params)
        conn.commit()
        cur.close()
        conn.close()
        return 'update success'
 
    def delete_one(self,sql,params):
        '''
        删除一条数据
        :param sql:
        :param params:
        :return:
        '''
        conn = pymysql.connect(**self.conn)
        cur = conn.cursor(cursor=pymysql.cursors.DictCursor)
        cur.execute(sql, params)
        conn.commit()
        cur.close()
        conn.close()
        return 'delete success'
 
pymysql操作数据库类

　　config文件配置

#!/usr/bin/env python
#coding:utf-8
 
conn_dict=dict(host='127.0.0.1',user='root',passwd='',db='db1')

　　获取插入的最后一条数据的自增ID

import pymysql
conn=pymysql.connect(host='localhost',user='root',password='',database='db1')
cursor=conn.cursor()
 
sql='insert into userinfo(name,password) values("xxx","123");'
rows=cursor.execute(sql)
print(cursor.lastrowid) #在插入语句后查看
 
conn.commit()
 
cursor.close()
conn.close()
 
获取插入的最后一条数据的自增ID