PYTHON3连接MYSQL数据库
http://smilejay.com/2013/03/python3-mysql-connector/
Python 2.x 上连接MySQL的库倒是不少的，其中比较著名就是MySQLdb（Django项目都使用它；我也在开发测试系统时也使用过），见：http://sourceforge.net/projects/mysql-python/
不过，目前MySQLdb并不支持python3.x，网上找了一些方法，后来我还是偶然发现MySQL官方已经提供了MySQL连接器，而且已经有支持Python3.x的版本了。MySQL Connector/Python, a self-contained Python driver for communicating with MySQL servers. 这个用起来还是感觉比较顺手的。
关于MySQL Connector/Python的各种介绍、安装、API等文档，还是参考官网吧：http://dev.mysql.com/doc/connector-python/en/index.html
（注意：安装程序将关于MySQL Connnector的python2的源文件复制到了python3库的位置（运行时会报语法错误），我就直接手动复制了其中python3/目录下的文件过去就解决。）
另外，Python3.x连接MySQL的其他方案有：oursql, PyMySQL, myconnpy 等，参考如下链接：
http://packages.python.org/oursql/
https://github.com/petehunt/PyMySQL/
https://launchpad.net/myconnpy
下面只是贴一个试用 MySQL Connector/Python 的Python脚本吧（包括创建表、插入数据、从文件读取并插入数据、查询数据等）：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
#!/usr/bin/python3
# a sample to use mysql-connector for python3
# see details from http://dev.mysql.com/doc/connector-python/en/index.html
import mysql.connector
import sys, os
user = 'root'
pwd = '123456'
host = '127.0.0.1'
db = 'test'
data_file = 'mysql-test.dat'
create_table_sql = "CREATE TABLE IF NOT EXISTS mytable ( \
id int(10) AUTO_INCREMENT PRIMARY KEY, \
name varchar(20), age int(4) ) \
CHARACTER SET utf8"
insert_sql = "INSERT INTO mytable(name, age) VALUES ('Jay', 22 ), ('杰', 26)"
select_sql = "SELECT id, name, age FROM mytable"
cnx = mysql.connector.connect(user=user, password=pwd, host=host, database=db)
cursor = cnx.cursor()
try:
cursor.execute(create_table_sql)
except mysql.connector.Error as err:
print("create table 'mytable' failed.")
print("Error: {}".format(err.msg))
sys.exit()
try:
cursor.execute(insert_sql)
except mysql.connector.Error as err:
print("insert table 'mytable' failed.")
print("Error: {}".format(err.msg))
sys.exit()
if os.path.exists(data_file):
myfile = open(data_file)
lines = myfile.readlines()
myfile.close()
for line in lines:
myset = line.split()
sql = "INSERT INTO mytable (name, age) VALUES ('{}', {})".format(myset[0], myset[1])
try:
cursor.execute(sql)
except mysql.connector.Error as err:
print("insert table 'mytable' from file 'mysql-test.dat' -- failed.")
print("Error: {}".format(err.msg))
sys.exit()
try:
cursor.execute(select_sql)
for (id, name, age) in cursor:
print("ID:{} Name:{} Age:{}".format(id, name, age))
except mysql.connector.Error as err:
print("query table 'mytable' failed.")
print("Error: {}".format(err.msg))
sys.exit()
cnx.commit()
cursor.close()
cnx.close()
|
另外，最后再贴一个使用MySQLdb的python2.x代码示例吧：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
#!/usr/bin/python2.7
# coding=utf-8
import MySQLdb
import sys
host = 'localhost'
user = 'root'
pwd = '123456' # to be modified.
db = 'test'
if __name__ == '__main__':
conn = MySQLdb.connect(host, user, pwd, db, charset='utf8');
try:
conn.ping()
except:
print 'failed to connect MySQL.'
sql = 'select * from mytable where id = 2'
cur = conn.cursor()
cur.execute(sql)
row = cur.fetchone()
# print type(row)
for i in row:
print i
cur.close()
conn.close()
sys.exit()
|
