Python------mysql数据库

Posted 2021-01-26 文城清枫

import pymysql

#一、直接连接mysql数据库
‘‘‘
coon=pymysql.connect(host=‘192.168.*.*‘,user=‘root‘,password=‘12345‘,port=3306,db=‘t3‘,charset=‘utf8‘,autocommit=True)
#建立游标
cur=coon.cursor()
sql=‘select * from u‘
#sql= ‘insert into u(name,id,sex,age) values("cat",4,"它",12)‘
cur.execute(sql)
#fetchall获取所有结果信息---返回二维元组；fetchone 获取一条数据---返回元组；fetchmany(2) 获取n条数据---返回元组
#print(cur.fetchall())
#print(cur.fetone())
#print(cur.fetchmany(2))
cur.close()
coon.close()
‘‘‘


#二、用函数形式操作mysql数据库（传递字典形式参数）

MYSQL_INFO = {
   ‘host‘:‘192.168.206.190‘,
   ‘user‘:‘root‘,
   ‘password‘:‘12345‘,
   ‘port‘:3306,
   ‘db‘:‘T3‘,
   ‘charset‘:‘utf8‘,
    ‘autocommit‘:‘True‘
}#数据库配置信息

def my_db(**kwargs):
   host=kwargs.get(‘host‘)
   user = kwargs.get(‘user‘)
   password = kwargs.get(‘password‘)
   port = kwargs.get(‘port‘)
   db = kwargs.get(‘db‘)
   charset = kwargs.get(‘charset‘)
   autocommit = kwargs.get(‘autocommit‘)
   print(host,user,password,port,db,charset,autocommit)
   print(type(host))
   coon = pymysql.connect(host=host, user=user, password=password, port=port, db=db, charset=charset,autocommit=autocommit)
   # 建立游标
   cur = coon.cursor()
   sql = ‘select * from u‘
   # sql= ‘insert into u(name,id,sex,age) values("cat",4,"它",12)‘
   cur.execute(sql)
   # fetchall获取所有结果信息---返回二维元组；fetchone 获取一条数据---返回元组；fetchmany(2) 获取n条数据---返回元组
   print(cur.fetchall())
   # print(cur.fetone())
   # print(cur.fetchmany(2))
   cur.close()
   coon.close()
my_db(**MYSQL_INFO)