python語言的3.x完全不向前兼容,導致我們在python2.x中可以正常使用的庫,到了python3就用不了了.比如說mysqldb

1.安裝pymysql

pymysql就是作為python3環(huán)境下mysqldb的替代物,進入命令行,使用pip安裝pymysql

pip install pymysql3

2.使用pymysql

在我們需要使用數(shù)據(jù)庫的.py文件開頭添加下面兩行

import pymysql
pymysql.install_as_MySQLdb()

第一行是引入pymysql,第二行是照顧習慣,將其當成是mysqldb一樣使用

Linux下python連接MySQL數(shù)據(jù)庫方法

要連接數(shù)據(jù)庫名稱是hhh，用戶名是tom，連接的數(shù)據(jù)表是 data_import，其中 data_import數(shù)據(jù)結構如下（5個屬性）：

mysql> desc data_import;?
+---------+-------------+------+-----+---------+-------+?
| Field?? | Type??????? | Null | Key | Default | Extra |?
+---------+-------------+------+-----+---------+-------+?
| id????? | char(10)??? | YES? |???? | NULL??? |?????? |?
| name??? | char(10)??? | YES? |???? | NULL??? |?????? |?
| age???? | char(10)??? | YES? |???? | NULL??? |?????? |?
| address | varchar(15) | YES? |???? | NULL??? |?????? |?
| hobby?? | varchar(15) | YES? |???? | NULL??? |?????? |?
+---------+-------------+------+-----+---------+-------+?
5 rows in set (0.01 sec)?

Linux下python連接MySQL數(shù)據(jù)庫完整例程：

            
#!/usr/bin/python 
import MySQLdb #導入庫 
conn = MySQLdb.connect(host="127.0.0.1",user="tom",passwd="123",db="hhh") 
#conn = MySQLdb.connect('localhost',"tom","123","hhh")#連接函數(shù) 
cur = conn.cursor()#獲得指向當前數(shù)據(jù)庫的指針 
#cur.execute('show tables;') 
cur.execute("select * from data_import;")#用execute（）方法執(zhí)行SQL語句 
result = cur.fetchall()#用fetchall()方法得到行信息 
for record in result: 
    print  "%s \t%s \t%s \t%s \t%s " % record#格式化輸出 
 
cur.close()#關閉指針對象 
conn.close()#關閉數(shù)據(jù)庫連接對象 
          

運行結果（部分）：

[root@localhost python]# ./python_mysql.py?
1?????? TOM???? 24????? Beijing???????? football?
2?????? LIU???? 27????? heibei? football?
3?????? JIM???? 26????? shandong??????? football?
4?????? HAN???? 28????? beijing???????? football?
5?????? MENG??? 25????? beijing???????? tennis?
1?????? TOM???? 24????? Beijing???????? football?

好了，本文全部內(nèi)容介紹完畢，希望本文分享對大家有所幫助。