如何使用python程序连接MySQL数据库?
当前回答
你可以用这种方式连接你的python代码到mysql。
import MySQLdb
db = MySQLdb.connect(host="localhost",
user="appuser",
passwd="",
db="onco")
cursor = db.cursor()
其他回答
对于python 3.3
CyMySQL https://github.com/nakagami/CyMySQL
我在windows 7上安装了pip,只是 安装cymysql
(你不需要cython) 快速无痛
这里有一种方法,使用MySQLdb,它只支持Python 2:
#!/usr/bin/python
import MySQLdb
# Connect
db = MySQLdb.connect(host="localhost",
user="appuser",
passwd="",
db="onco")
cursor = db.cursor()
# Execute SQL select statement
cursor.execute("SELECT * FROM location")
# Commit your changes if writing
# In this case, we are only reading data
# db.commit()
# Get the number of rows in the resultset
numrows = cursor.rowcount
# Get and display one row at a time
for x in range(0, numrows):
row = cursor.fetchone()
print row[0], "-->", row[1]
# Close the connection
db.close()
参考这里
Mysqlclient是最好的,因为其他的只支持特定版本的python
pip install mysqlclient
示例代码
import mysql.connector
import _mysql
db=_mysql.connect("127.0.0.1","root","umer","sys")
#db=_mysql.connect(host,user,password,db)
# Example of how to insert new values:
db.query("""INSERT INTO table1 VALUES ('01', 'myname')""")
db.store_result()
db.query("SELECT * FROM new1.table1 ;")
#new1 is scheme table1 is table mysql
res= db.store_result()
for i in range(res.num_rows()):
print(result.fetch_row())
参见https://github.com/PyMySQL/mysqlclient-python
对于Python3.6,我找到了两个驱动程序:pymysql和mysqlclient。我测试了它们之间的性能,得到的结果是:mysqlclient更快。
下面是我的测试过程(需要安装python lib profilehooks来分析时间流逝:
select * from FOO;
立即在mysql终端执行: set中有46410行(0.10秒)
pymysql (2 . 4s):
from profilehooks import profile
import pymysql.cursors
import pymysql
connection = pymysql.connect(host='localhost', user='root', db='foo')
c = connection.cursor()
@profile(immediate=True)
def read_by_pymysql():
c.execute("select * from FOO;")
res = c.fetchall()
read_by_pymysql()
下面是pymysql的配置文件:
mysqlclient 0.4s)
from profilehooks import profile
import MySQLdb
connection = MySQLdb.connect(host='localhost', user='root', db='foo')
c = connection.cursor()
@profile(immediate=True)
def read_by_mysqlclient():
c.execute("select * from FOO;")
res = c.fetchall()
read_by_mysqlclient()
下面是mysqlclient的配置文件:
因此,mysqlclient似乎比pymysql快得多
首先安装驱动程序(Ubuntu)
Sudo apt-get install python-pip sudo pip install -U pip Sudo apt-get install python-dev libmysqlclient-dev sudo apt-get install MySQL-python
MySQL数据库连接代码
import MySQLdb
conn = MySQLdb.connect (host = "localhost",user = "root",passwd = "pass",db = "dbname")
cursor = conn.cursor ()
cursor.execute ("SELECT VERSION()")
row = cursor.fetchone ()
print "server version:", row[0]
cursor.close ()
conn.close ()
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